What Porsche Owners and Engine Builders Should Know About Nikasil Cylinder Plating

Nikasil cylinder plating has played an important role in Porsche engine technology for decades. Long before many modern engines began using thermal spray coatings, aluminum-silicon bores, or other advanced cylinder surface technologies, Nikasil helped make lightweight aluminum cylinders practical for high-performance engines.

For Porsche owners, Nikasil is often associated with aircooled 911 engines, racing engines, and high-performance cylinder sets. For engine builders, it remains one of the most important cylinder bore technologies to understand because it requires the right inspection, honing, cleaning, piston ring selection, and break-in procedures.

LN Engineering has extensive experience with Nikasil and Nickel Silicon Carbide cylinder platings through its Nickies cylinders, watercooled sleeves, and Porsche cylinder reconditioning services. 

What Is Nikasil?

Nikasil is a nickel-silicon carbide cylinder bore plating developed by Mahle in the 1960s and is still used today by Mahle Motorsport in their Porsche piston and cylinder sets. It was originally created to provide a hard, wear-resistant surface for aluminum rotary engine housings, allowing seals to run directly against an aluminum component that would otherwise be too soft for long-term durability.

The same basic idea applies to piston engines. Aluminum offers excellent heat transfer and reduced weight, but it needs a durable wear surface for the piston rings. Nikasil provides that surface by electroplating a nickel matrix containing silicon carbide particles onto the cylinder bore.

Silicon carbide is extremely hard, and when it is properly distributed in the nickel matrix, it creates a durable surface for the piston rings to run against. This allows an aluminum cylinder or aluminum engine block to retain the heat-transfer advantages of aluminum while providing a wear surface suitable for high-performance operation.

Why Porsche Used Nikasil

Porsche was one of the early manufacturers to use Nikasil in high-performance piston engines. The technology was used in Porsche racing engines and later became well known in production aircooled Porsche engines.

Compared with cast iron liners, Nikasil-plated aluminum cylinders offer several advantages. They transfer heat efficiently, reduce weight, allow tighter piston-to-cylinder clearances, and provide excellent wear resistance when paired with compatible rings and proper surface finish.

For Porsche engines, these advantages are especially important. Aircooled engines depend heavily on efficient heat transfer, and high-performance engines benefit from reduced friction, improved ring seal, and stable cylinder geometry.

Nikasil vs. Cast Iron Cylinders

Traditional cast iron cylinders and sleeves are durable and familiar to most engine builders, but they do not transfer heat as efficiently as aluminum. A cast iron sleeve installed in an aluminum cylinder or block can create a thermal barrier because the two materials expand and transfer heat differently.

Nikasil allows the piston rings to run on a very hard plated surface while still allowing the aluminum cylinder to transfer heat efficiently. This can help the engine run cooler, maintain more consistent clearances, and support improved performance.

Nikasil and similar Nickel Silicon Carbide platings are also oleophilic, meaning they have an affinity for oil. This helps support lubrication at the ring-to-cylinder interface and contributes to reduced friction compared with many traditional iron or steel cylinder surfaces.

What Is NSC Plating?

NSC stands for Nickel Silicon Carbide. It is a nickel-silicon carbide composite plating similar in function and performance to Nikasil. 

In simple terms, NSC plating uses very small silicon carbide particles suspended in a nickel matrix. One useful way to think about it is like concrete: the silicon carbide particles act like the rock, while the nickel acts like the cement holding everything together.

Once plated and honed, the result is a thin, hard, durable cylinder bore surface that supports the piston rings while preserving the heat-transfer benefits of an aluminum cylinder.

Why Surface Finish Matters So Much

Nikasil is much harder than cast iron. That hardness is one of its greatest advantages, but it also means that the surface finish must be correct before the engine is assembled.

On a conventional cast iron cylinder, the rings may wear in against the bore during break-in. With Nikasil, the cylinder surface is so hard that the rings cannot be expected to correct an improper finish. If the bore is too rough, the rings can wear prematurely. If it is too smooth, the rings may not seat properly. If the valleys are not right, oil retention can suffer.

That is why proper honing and plateau finishing are critical. The honing process must expose the silicon carbide particles, establish the correct crosshatch, and produce the right balance of peak height and valley depth.

Profilometry and Quality Control

A visual inspection is not enough to verify a Nikasil cylinder bore. Surface finish should be checked with a profilometer, which measures surface texture and helps confirm that the bore has the correct finish for ring sealing and oil control.

Important surface finish values include Ra, Rpk, Rk, and Rvk. These measurements help evaluate the roughness average, reduced peak height, core roughness, and reduced valley depth of the bore surface.

LN Engineering verifies cylinder geometry and surface finish as part of its quality control process. Bore geometry, ovality, taper, and surface finish all matter because ring seal depends on more than simply having a clean-looking cylinder.

Can Nikasil Cylinders Be Reused?

In many cases, Nikasil-plated cylinders can be reused if there is no visible damage and no measurable wear beyond acceptable limits. However, the cylinders and pistons must be inspected and measured carefully.

If the cylinder is in good condition, it may be possible to re-ring the pistons after the cylinder has been properly deglazed and thoroughly cleaned. This does not mean aggressive honing is always appropriate. Nikasil plating is thin, and unnecessary material removal can create clearance problems or compromise the plating.

As a general rule, if the cylinder has significant wear, scratches that catch a fingernail, chips, nicks, cut-through, worn spots, excessive ovality, or taper, the cylinder should be evaluated for replating rather than simply being reused.

Can Nikasil Cylinders Be Re-Honed?

Nikasil cylinders can sometimes be lightly honed, but this must be done carefully. The plating is thin, and piston-to-cylinder clearance must always be considered.

Removing too much material can increase clearance and lead to piston slap, oil consumption, poor ring seal, or other problems. If wear is beyond what can be corrected safely, stripping and replating is the better repair path.

This is where experienced Porsche cylinder reconditioning matters. The goal is not simply to make the bore look better. The goal is to restore the correct geometry, surface finish, and compatibility between the bore, piston, and rings.

When Should Nikasil Cylinders Be Replated?

Nikasil cylinders should be replated when the original plating is damaged, worn through, chipped, scratched, or no longer within specification. Damage can come from dirt ingestion, poor air filtration, foreign object debris, overheating, improper assembly, or normal wear over a long service life.

The replating process generally involves stripping the existing plating, inspecting the bare aluminum bore, repairing or correcting damage where possible, preparing the surface, electroplating the new Nickel Silicon Carbide layer, and then diamond honing the cylinder to final size and finish.

This process restores the wear surface while retaining the benefits of an aluminum cylinder. In some cases, damaged bores can be bored slightly oversize and plated back to the correct finished dimension. In more severe cases, additional repair steps may be required.

Ring Compatibility Is Critical

Piston ring selection is one of the most important considerations when working with Nikasil-plated cylinders. Not every ring material or coating is appropriate.

Historically, phosphate-coated cast iron rings have been commonly used with Nikasil bores. Chrome-faced rings should not be used with Nikasil. Chrome nitride, ductile iron, plasma-moly, and soft gas-nitrided rings may be compatible depending on the application, piston design, and bore finish.

Even when the correct rings are selected, the surface finish and cleaning process still matter. If the cylinder is not finished or cleaned correctly before assembly, the ring faces can be damaged by contamination or an improper surface profile.

Cleaning Nikasil Cylinders Before Assembly

Cleaning is one of the most commonly overlooked steps in engine building. Freshly honed Nikasil cylinders must be cleaned thoroughly before assembly because honing debris and abrasive residue can remain in the crosshatch and surface valleys.

If that contamination is left behind, it can damage the piston rings, cylinder walls, and piston skirts during break-in. Proper cleaning also affects profilometer readings, which means surface finish should ideally be checked after cleaning, not only before cleaning.

LN Engineering recommends careful cylinder cleaning procedures and emphasizes that the final cleaning step is critical. A clean bore helps improve ring seal, reduce blow-by, reduce oil consumption, and prevent avoidable wear.

Assembly and Break-In Considerations

Engines with Nikasil cylinders require proper assembly practices. A tapered sleeve ring compressor is strongly recommended because it applies even pressure to the rings and helps reduce the risk of ring distortion or cylinder damage during piston installation.

Dry assembly should be avoided. At minimum, the bores should receive appropriate light lubrication, and the pistons, rings, and wrist pins should be lubricated with a suitable conventional, non-friction-modified oil or appropriate piston assembly lubricant.

Break-in is also critical. The engine needs load after initial startup and camshaft or valvetrain break-in so that cylinder pressure can help seat the rings. Excessive idling, overly rich running, fuel washdown, or using friction-modified synthetic oil too early can interfere with ring seating.

Depending on the engine, rings, oil, tuning, and break-in procedure, ring seating may take time. Some oil consumption during early break-in can be normal, but the correct oil, proper load, and careful monitoring are important.

Nikasil Streaking Is Not Always Bore Scoring

After break-in, Nikasil cylinders may show streaking that can be mistaken for bore scoring during borescope inspection. In many cases, light streaking is simply transfer from the rings or piston coatings as the parts wear into each other.

This type of streaking is often cosmetic and may diminish with continued normal operation. True scoring, damaged plating, or material transfer must still be evaluated carefully, but not every visible mark in a Nikasil cylinder is automatically a failure.

Why Porsche Owners Should Care

For Porsche owners, Nikasil matters because it is part of what makes many Porsche engines durable, efficient, and capable of high performance. When maintained properly, Nikasil-plated cylinders can last a very long time.

However, the same technology that makes Nikasil effective also means that rebuild work must be done correctly. The wrong honing procedure, incorrect piston rings, poor cleaning, improper assembly lubrication, or poor break-in can lead to oil consumption, poor ring seal, smoking, or premature wear.

For anyone rebuilding an aircooled Porsche engine, repairing a watercooled Porsche engine, or evaluating used cylinders, the key is measurement. Bore condition, piston clearance, ovality, taper, surface finish, and ring compatibility should all be verified before final assembly.

LN Engineering Nikasil and NSC Cylinder Services

LN Engineering offers Nikasil and NSC cylinder solutions for Porsche engines, including Nickies cylinders, watercooled sleeves, and cylinder reconditioning services. These solutions are designed for engine builders and Porsche owners who want the benefits of aluminum cylinders with a durable Nickel Silicon Carbide wear surface.

Whether the goal is restoring original Porsche Nikasil cylinders, repairing damaged aluminum engine blocks, or building a performance engine with modern cylinder technology, the process requires experience, proper equipment, and careful quality control.

Learn more about LN Engineering’s Nikasil and NSC cylinder plating process here:

Nikasil and NSC Cylinder Reconditioning and Plating for Porsche Engines

Final Thoughts

Nikasil remains one of the most important cylinder bore technologies used in Porsche engines. It offers excellent heat transfer, low friction, strong wear resistance, and long service life when used correctly.

For Porsche owners, the takeaway is simple: Nikasil is a proven technology, but it must be inspected, serviced, and rebuilt properly. However Porsche has moved away from Nikasil, as have other manufacturers, and are now using coatings like APS and PTWA.

For engine builders, the takeaway is even more important: Nikasil cylinders require correct measurement, compatible piston rings, proper honing, thorough cleaning, and careful break-in. When those steps are followed, Nikasil and NSC-plated cylinders can provide exceptional performance and durability in both street and performance Porsche engines.

Bore Scoring, Modern Cylinder Coatings, and What Porsche Owners and Shops Should Know

Bore scoring remains one of the most talked-about issues in the watercooled Porsche community. For many Porsche owners, the subject can be confusing because not every modern Porsche engine is affected in the same way, and not every engine with aluminum cylinder bores carries the same risk.

At the same time, modern cylinder bore technology has changed dramatically. Today’s Porsche engines, along with many other modern performance engines, use advanced bore materials and coatings that require a very different approach to inspection, repair, honing, piston selection, and ring compatibility.

That is why understanding which engine is in the car matters. It is also why owners, shops, and engine builders need to recognize that modern cylinder coatings cannot always be evaluated or repaired like traditional cast iron cylinders.

Not Every Porsche Engine Commonly Experiences Bore Scoring

Although bore scoring is a real concern on certain Porsche engines, it is not accurate to say that every modern Porsche engine is equally prone to the problem. Some engines and model families are not commonly associated with bore scoring, while others require more careful inspection due to their design, materials, piston skirt coatings, ring packs, oiling behavior, operating temperatures, and long-term wear patterns.

LN Engineering has published a detailed guide covering Porsche models that do not commonly experience bore scoring, along with important context about which engines are more susceptible and why.

Learn more about Porsche models without bore scoring

For Porsche owners, this information is especially useful when shopping for a used Boxster, Cayman, 911, Cayenne, Panamera, or Macan. A proper pre-purchase inspection should always consider the specific engine family, not just the model badge on the decklid.

Why Modern Cylinder Bore Technology Matters

For decades, engine builders were accustomed to working with cast iron cylinders or iron sleeves. Those materials could often be bored, honed, and reconditioned using familiar procedures. Modern engines are different.

Many current aluminum engines use engineered bore surfaces instead of conventional iron liners. These include Alusil, Lokasil, Nikasil, PTWA, APS/SUMEbore, and other thermal spray systems. These technologies are not experimental. They are proven production solutions used by major manufacturers across domestic, European, and Japanese platforms.

The advantage is clear. Aluminum blocks with advanced bore surfaces can reduce weight, improve heat transfer, reduce friction, and support modern fuel economy and emissions requirements. The challenge is that these surfaces require the correct repair strategy.

A shop cannot assume that a modern Porsche cylinder can be treated like an older cast iron bore.

Alusil and Lokasil Cylinder Bores

Alusil, Lokasil, and related aluminum-silicon bore technologies use a hypereutectic aluminum-silicon surface. After machining, the aluminum matrix is selectively removed so that silicon particles are exposed. These exposed silicon particles become the load-bearing surface for the piston rings.

When properly manufactured and finished, this type of bore can provide excellent heat transfer and reduced weight. However, the surface depends on the correct exposure of silicon. If the silicon is not properly exposed, or if the silicon particles are damaged during machining or honing, the bore may not support the oil film and tribofilm needed to protect the pistons and rings.

That is one reason bore scoring can occur. The piston, rings, oil, cylinder finish, and operating conditions all have to work together.

From a rebuilding standpoint, Alusil and similar bores require compatible pistons, skirt coatings, and ring materials. Conventional assumptions about piston rings do not always apply. For example, conventional plasma-moly top rings are not appropriate for exposed aluminum-silicon bores. Correct ring selection is essential.

Nikasil and Electroplated Cylinder Coatings

Nikasil and other nickel-silicon carbide coatings have long been associated with high-performance engines. These coatings are hard, durable, and thermally conductive when paired with compatible rings and proper lubrication.

However, Nikasil coatings are thin. Once finish-honed, they are typically only a few thousandths of an inch thick. That means there is very little margin for overbore correction. If the cylinder is scratched, worn, out of round, or has surface finish problems, the proper repair is usually stripping and replating rather than simply honing more material away.

Ring compatibility is also critical. Low-tension ring packages are typically required, and chrome-faced rings are generally not the preferred choice for Nikasil. Cast or ductile iron rings may be used in some OEM applications, but the final ring package must be selected based on the bore material, coating, piston design, and intended use.

This is especially important for shops rebuilding Porsche engines. A cylinder that looks acceptable visually may still have an incorrect surface finish, ring compatibility issue, or coating problem that prevents a successful rebuild.

PTWA, APS, SUMEbore, and Thermal Spray Cylinder Bores

Many modern engines now use thermal spray coatings instead of traditional liners or electroplated coatings. PTWA (Plasma Transferred Wire Arc) uses a steel wire that is melted, atomized, and sprayed onto a prepared aluminum bore. APS, or Atmospheric Plasma Spray, uses powdered material instead of wire. SUMEbore is one example of an APS-based technology.

These coatings allow manufacturers to retain the weight and heat-transfer advantages of aluminum while creating a bore surface that behaves more like iron from a tribological standpoint.

Porsche has used modern sprayed bore technologies in later horizontally opposed engines, including 718, 991.2, and newer applications. VW, Audi, Porsche V8 engines, Ford, Nissan, and other manufacturers have also used thermal spray cylinder technologies in production engines.

These coatings are thin, often around the same 0.1 mm class as electroplated coatings. In many cases, there is effectively no overbore margin. If the bore is damaged, the solution may require recoating, replating, boring, or sleeving depending on the engine design and the extent of the damage.

Why Honing Modern Coated Bores Requires Caution

Modern coated bores cannot be honed casually. Nikasil, PTWA, APS, SUMEbore, and similar coatings often leave very little room for material removal. A shop attempting to “clean up” a cylinder without understanding coating thickness may remove too much material, alter the surface finish, or compromise the coating entirely.

Surface finish validation is especially important. A bore may appear clean and usable to the naked eye, but still have an unsuitable finish for ring sealing. Conversely, some thermal spray bores may show visible porosity that is part of the coating’s intended oil-retention structure.

This is where profilometry becomes essential.

Surface Finish Measurement and Profilometry

Surface finish measurement is one of the most important steps when evaluating modern cylinder bores. A handheld profilometer, such as a Mitutoyo SJ-210, is commonly used, but the stylus tip size, filtering method, and interpretation of the data matter.

Conventional cast iron surfaces are often easier to evaluate using standard methods. Porous thermal spray coatings can be more difficult because larger stylus tips may bridge narrow valleys and under-report true valley depth. Robust filtering and smaller stylus tips may provide a more accurate understanding of the bore’s actual surface structure.

Cleaning before measurement is equally important. Honing debris, folded material, embedded contamination, or residue in the coating’s valleys can distort profilometer readings. A bore should not be evaluated until it has been properly cleaned.

For engine builders, the key point is that a visual inspection alone is not enough. Measuring bore geometry and surface finish before and after reconditioning is essential.

Ring Compatibility Cannot Be Ignored

Modern bore technologies require compatible piston rings. The ring face coating, ring tension, bore material, oil film behavior, and cylinder finish must all be matched.

For example, modern PTWA and APS thermal spray bores are often paired with advanced ring coatings designed for high load, low friction, and boundary lubrication conditions near top dead center. CrN-faced steel rings and HVOF-applied cermet coatings are examples of ring technologies used in severe modern applications.

Under boosted or high specific-output conditions, the ring-to-liner interface experiences higher cylinder pressure, greater contact stress, and reduced oil film thickness. Choosing the wrong ring can lead to accelerated wear, poor sealing, oil consumption, or scuffing.

This is why shops should not assume that a ring package that works on cast iron will work on Alusil, Nikasil, PTWA, APS, or SUMEbore.

What Porsche Owners Should Take Away

For Porsche owners, the most important takeaway is simple: know which engine is in the car.

Bore scoring risk depends on the specific engine family, cylinder technology, piston design, operating history, maintenance habits, oil choice, and inspection results. Some Porsche engines are not commonly associated with bore scoring, while others deserve careful evaluation, especially when symptoms such as ticking noises, elevated oil consumption, metallic debris, or visible cylinder damage are present.

A qualified Porsche specialist should use the correct inspection methods, including borescope inspection where appropriate. In some cases, oil analysis, compression testing, leakdown testing, and careful evaluation of engine noise may also be useful.

Read LN Engineering’s guide to Porsche models without bore scoring

What Shops and Engine Builders Should Take Away

For shops and engine builders, the takeaway is even more important. Modern cylinder coatings cannot always be repaired using traditional assumptions.

Thin coatings such as Nikasil, PTWA, APS, and SUMEbore leave very little margin for honing. Before attempting to re-ring, hone, or recondition a modern coated cylinder, the builder should identify the bore technology, measure geometry, validate surface finish, clean the bore properly, and confirm piston and ring compatibility.

Depending on the condition of the bore, the correct repair path may include recoating, replating, boring, sleeving, or replacing the cylinder block or crankcase component. The wrong repair can lead to poor ring seal, oil consumption, scuffing, and premature engine failure.

Modern Cylinder Coatings Are Here to Stay

Modern bore technologies are not a temporary trend. They are now part of mainstream engine manufacturing. Alusil, Lokasil, Nikasil, PTWA, APS, SUMEbore, and related systems have all been used successfully in production engines.

The responsibility of the modern Porsche owner, technician, and engine builder is to understand these technologies well enough to make informed service decisions.

For owners, that means understanding whether an engine is commonly affected by bore scoring and choosing a qualified shop for inspection and repair.

For shops, it means using data, measurements, and validated procedures rather than guesswork.

As engine technology continues to evolve, successful Porsche engine service will depend on understanding not only the symptoms of bore scoring, but also the cylinder bore materials and coatings behind them.

What the LiquidPiston “Inside-Out” Rotary Engine Teaches Us About Tribology, Lubrication, and Oil Testing

The Wankel rotary engine has always been one of the most fascinating alternatives to the traditional piston engine. It is compact, smooth, lightweight, and capable of producing impressive power for its size. That combination made it famous in Mazda sports cars and useful in certain UAV applications, where power-to-weight ratio matters.

But the Wankel also has well-known weaknesses. Sealing, lubrication, emissions, oil consumption, and long-term durability have always been part of the rotary engine conversation. In a recent Motor Oil Geek video, Lake Speed Jr. visits LiquidPiston to look at a very different approach: what happens when the rotary engine concept is effectively turned inside out?

The result is LiquidPiston’s X-Engine, an “inverted rotary” design that keeps some of the rotary engine’s best traits while attempting to solve some of the tribological problems that limited the traditional Wankel.

Why Tribology Is the Real Story

Tribology is the study of interacting surfaces in relative motion, including friction, wear, and lubrication. STLE defines the field around those three core subjects: friction, wear, and lubrication, with lubrication used to minimize friction and wear.

That makes engines one of the best real-world examples of tribology in action. Every internal combustion engine depends on controlling friction, maintaining oil films, reducing wear, removing heat, and keeping contamination under control. Whether the engine is a conventional piston engine, a Wankel rotary, or LiquidPiston’s inverted rotary, the same basic questions apply: where are the sliding surfaces, how are they loaded, how are they lubricated, and how well are they sealed?

Lake opens the video by reminding viewers that in a reciprocating piston engine, one of the biggest sources of friction is the piston ring rubbing against the cylinder wall. Near top dead center, the ring sees high combustion load while its sliding speed is low. That combination of high load and low speed is a difficult lubrication condition and a major source of friction and wear.

The Wankel rotary was one attempt to avoid some of the drawbacks of reciprocating motion. Instead of pistons moving up and down, the rotor turns smoothly in one direction. That gives the rotary engine excellent smoothness and power density. But changing the geometry does not eliminate tribology problems. It simply changes them.

The Wankel Rotary’s Strengths and Weaknesses

The traditional Wankel rotary uses a roughly triangular rotor moving inside a peanut-shaped, trochoid housing. The design is compact, smooth, responsive, and capable of making a lot of power from a small package. That is why rotary engines earned such a loyal following in performance cars and why they have been attractive for UAVs and other applications where size and weight matter.

The problem is that the Wankel’s sealing and lubrication requirements are challenging. The apex seals move around the housing at high speed, and the combustion chamber is long, thin, and constantly moving. That geometry makes it harder to achieve high compression, direct fuel injection, consistent combustion, clean emissions, and ideal seal lubrication.

In the video, LiquidPiston co-founder Alec Shkolnik explains that Wankel engines have struggled with fuel burning, sealing, cooling, lubrication, emissions, efficiency, and durability. Lake points out that those problems are tribological in nature because they involve surfaces, seals, oil films, deposits, friction, and wear.

A traditional Wankel often lubricates the apex seals by injecting or metering oil into the combustion chamber. That oil is then burned, at least partially. This creates emissions challenges and can also contribute to deposits. Lake adds an important oil-related point: some synthetic oils, especially uniform PAO-based synthetics, can form harder varnish-like deposits when burned, which may be damaging to rotary seals. This is one reason many traditional rotary owners have historically preferred conventional oils.

That does not mean synthetic oil is “bad” in all engines. It means the lubrication environment matters. An oil that works well in one engine design may not be ideal in another if that engine intentionally burns oil as part of its seal lubrication strategy. Same goes with assumption that as long as you use a modern oil that you will be protected. 

LiquidPiston’s Inverted Rotary Concept

LiquidPiston’s X-Engine changes the rotary layout. Instead of a triangular rotor inside a peanut-shaped housing, it uses a peanut-shaped rotor inside a three-lobed housing. In the video, Shkolnik describes it as the “un-Wankel” or “inverted rotary.”

That geometric inversion matters because it changes the engine’s combustion and sealing behavior. LiquidPiston says its X-Engine platform is intended to deliver high power density, lower vibration, lower noise, and reduced size and weight compared with conventional engines, with a focus on military, aerospace, mobility, and drone applications.

The company’s XTS-210 variant is a 25-horsepower, 210cc, two-stroke, supercharged, liquid-cooled X-Engine under development. LiquidPiston describes it as heavy-fuel compatible with diesel, Jet A, JP-8, and kerosene, as well as multi-fuel capable with fuels such as gasoline, propane, and hydrogen. The company also states that the XTS-210 is intended to provide much higher power density than piston diesel engines.

For military and UAV applications, that is a big deal. If a small engine can run on heavy fuels like JP-8 or Jet A while remaining compact and lightweight, it can simplify fuel logistics and improve power density in applications where every pound matters.

Stationary Combustion Chamber, Better Combustion Potential

One of the most important differences between the Wankel and LiquidPiston design is the combustion chamber. In a Wankel, the combustion chamber is long, narrow, and moving. That creates challenges for compression ratio, direct injection, flame travel, and complete combustion.

LiquidPiston’s inverted design allows for a more stationary combustion chamber. In the video, Shkolnik explains that this makes it more suitable for high compression and direct injection into a stationary target. Lake notes that a more controllable combustion chamber can improve air-fuel mixing and reduce the kind of incomplete combustion that creates contamination.

That point matters for lubrication. Poor combustion does not just hurt power and emissions. It also contaminates the oil. Fuel dilution, soot, partially burned hydrocarbons, water, and combustion byproducts can all shorten oil life and increase wear risk.

Oil Life Comes Down to Heat and Contamination

One of the best takeaways from Lake’s video is his explanation of oil degradation. Motor oil typically degrades through two primary pathways: temperature and contamination. He explains that for roughly every 10°C, or 18°F, increase in operating temperature, the oxidation rate doubles and oil life is effectively cut in half. Contamination is the other major factor, including blowby, soot, water, dirt, and other materials that enter the lubricant. This is a great takeaway - when choosing the right engine oil, you need to take into consideration the application and operating environment.

This is where LiquidPiston’s design becomes especially interesting. Lake says that in a 50-hour test, the engine oil showed essentially no change from the baseline in oxidation, viscosity, or wear metals. He attributes that to effective sealing, controlled temperature, and limited contamination reaching the crankcase and bearing oil.

That is a powerful lesson for any engine owner, not just someone interested in rotary engines. Oil life is not only about mileage. It is about operating temperature, fuel dilution, contamination, oxidation, and wear. Two engines can run the same oil for the same number of hours and produce very different oil analysis results depending on how cleanly they burn fuel, how well they seal, and how hot the oil runs.

Why Seal Location Changes the Lubrication Problem

A traditional Wankel has apex seals moving at high speed around the housing. Those seals are hard to lubricate, and because oil is typically introduced into the combustion chamber, some of it burns. That contributes to hydrocarbon emissions and deposit formation.

LiquidPiston still has sealing challenges, but the geometry changes where those challenges occur. In the X-Engine, the apex seals are stationary in the housing, while other sealing elements, including side seals, still require lubrication. Shkolnik explains that because the seals are stationary, it should be easier to deliver oil exactly where it is needed.

That is the tribology lesson: lubrication is not just about choosing an oil. It is about getting the right oil, in the right amount, to the right surface, at the right time, under the right load and temperature. Geometry can make that easier or harder.

In the Wankel, the moving seal geometry makes lubrication difficult and contributes to oil consumption and emissions. In LiquidPiston’s design, the goal is to keep the rotary engine’s compactness and smoothness while making combustion, sealing, and lubrication more manageable.

Why This Matters Even If You Do Not Own a Rotary

This video is not about a Porsche engine, but it is still relevant to anyone interested in Porsche engine durability, oil selection, used oil analysis, and proper lubrication. The same principles apply to flat-sixes, air-cooled engines, water-cooled M96/M97 engines, GT engines, race engines, and modern direct-injected engines.

The lesson is that engine design and oil choice cannot be separated. Oil is not just a generic fluid poured into the engine. It is part of the mechanical system. It must handle heat, contamination, fuel dilution, blowby, sliding friction, boundary lubrication, oxidation, deposit control, and wear protection.

In a Porsche engine, those concerns may show up as bore scoring risk, fuel dilution from short trips, timing chain wear, high oil temperatures, lifter noise, camshaft wear, ring seal issues, or deposit formation. In a rotary engine, they may show up as apex seal wear, oil consumption, hydrocarbon emissions, and varnish deposits. The hardware is different, but the tribology questions are familiar.

Used Oil Analysis Is How You Verify What Is Happening

One of the most important points in the video is that Lake does not just talk about oil condition in theory. He discusses measured oil data from testing. The claim that the LiquidPiston oil remained stable over 50 hours is based on oil analysis indicators such as oxidation, viscosity, and wear metals.

That is exactly why used oil analysis is valuable. It helps separate assumptions from evidence. Instead of guessing whether an oil is holding up, testing can show whether the oil is oxidizing, thinning, thickening, accumulating fuel, showing elevated wear metals, or becoming contaminated.

For Porsche owners, oil analysis can be especially useful because many problems develop gradually. A single report can provide a snapshot, but trending reports over time are even more useful. Changes in iron, aluminum, copper, fuel dilution, viscosity, insolubles, or oxidation may reveal changes in operating conditions or mechanical health before a major symptom appears.

Oil Choice Still Has to Match the Application

The video also reinforces an important point about oil selection. The right oil depends on the engine’s design, operating environment, and lubrication strategy.

Lake’s discussion of conventional versus synthetic oil in Wankel engines is a good example. In many piston engines, a high-quality synthetic oil may offer better oxidation resistance, cold-start performance, and high-temperature stability. But in a traditional rotary where some oil is intentionally burned to lubricate seals, deposit characteristics become extremely important. An oil that burns into hard deposits can create problems in that specific application.

That is why blanket statements about oil are risky. “Synthetic is always better” or “conventional is always safer” oversimplifies the issue. A better question is: what does this engine need the oil to do?

For Porsche applications, that means considering engine family, bearing clearances, oil temperature, catalyst compatibility, fuel dilution, track use, bore material, ring package, age, and known failure modes. For a rotary, it means considering seal lubrication, deposit formation, combustion contamination, and whether oil is being burned as part of normal operation.

The Bigger Takeaway

LiquidPiston’s X-Engine is interesting because it is not just another rotary engine. It is an attempt to rethink the geometry that created many of the Wankel’s tribological problems in the first place. By turning the layout inside out, the design seeks to preserve rotary advantages such as compact size, low vibration, high power density, and rapid response while improving combustion, sealing, lubrication, emissions, and oil life.

Whether the X-Engine becomes widely adopted remains to be seen. But as a teaching tool, it is excellent. It shows that lubrication problems are often design problems. It shows that oil life depends heavily on contamination control. It shows that seal geometry affects emissions and deposits. It shows why used oil analysis matters. And it shows why tribology is central to every internal combustion engine, from a tiny UAV powerplant to a Porsche flat-six.

For enthusiasts, the most useful lesson is simple: oil is not just maintenance. Oil is part of the engineering. Choose it carefully, test it when possible, and remember that every engine’s lubrication needs are shaped by its design.

Mitutoyo SJ-220 Profilometer: Why Surface Finish Measurement Matters for Cylinder Bores

Keith Jones from Total Seal Piston Rings recently introduced the new Mitutoyo SJ-220 profilometer, and for engine builders who care about cylinder bore finish, this is a significant update. The SJ-220 replaces the recently discontinued SJ-210 and brings a new chassis, updated controls, a color touchscreen, USB-C connectivity, and optional Bluetooth wireless capability. For anyone who measures cylinder wall finish, deck surfaces, or other critical machined surfaces, the new SJ-220 looks like a major step forward.

Keith has spent decades working with profilometers and cylinder bore surface finish, going back to older analog machines, large SJ301 units, paper printouts, and earlier portable Mitutoyo models. Over time, the portable Mitutoyo units evolved through models such as the SP211, SJ201, and SJ210. Those earlier units shared a similar physical platform, with each generation adding more capability. The SJ-220, however, is not just another feature update. Keith describes it as an all-new handheld unit and calls it a “game changer.”

Why a Profilometer Matters in the First Place

Cylinder bore finish is one of the most important details in building a reliable, powerful engine. It is also one of the most misunderstood. Many people look at a fresh hone pattern and assume that if the crosshatch looks right, the cylinder finish must be right. The problem is that appearance alone is not enough.

A profilometer measures the surface finish so the engine builder can verify what the cylinder wall actually looks like at a microscopic level. That matters because piston rings are lubricated parts. They need a controlled oil film between the ring face and the cylinder wall. That oil film does two jobs at the same time: it lubricates the ring and also helps seal the ring against the cylinder wall.

Lake Speed Jr. (The Motor Oil Geek) has explained this concept well in previous Total Seal educational content. The oil on the cylinder wall acts like a moving gasket. Since oil is not a fixed gasket, the cylinder wall must have the right surface texture to retain it. The valleys in the cylinder wall hold oil, while the peaks and plateaued areas help support the rings. If the surface is too rough, it can wear the rings. If it is too smooth or lacks enough valley depth, it may not retain enough oil. Either condition can hurt ring seal, increase wear, reduce horsepower, and shorten engine life. 

It's even worse with Nikasil - if it's not honed perfectly - you'll know almost immediately. Engines will burn oil, smoke, and ultimately fail in hundreds, not thousands, of miles. That's why LN Engineering uses their SJ-210 and SJ-220 along with Digital Metrology's TraceBoss+ to make sure every cylinder that leaves their shop has passed their quality control checks.

That is why a profilometer is not just a fancy measuring tool. It is the only practical way to confirm that the hone finish matches the piston ring package, cylinder material, fuel type, and application. 

Not checking your cylinders and assuming they are honed correctly is like playing Russian roulette.

The SJ-220: A New Handheld Profilometer from Mitutoyo

In Keith’s SJ-220 video, the first thing that stands out is that this is not simply an SJ-210 with a new label. The SJ-220 has a new case, new body design, updated ports, and a color touchscreen interface. Keith highlights the unit’s USB-C connection for charging and computer communication, along with an optional Bluetooth module that allows wireless operation when paired with the proper software.

The kit includes the main SJ-220 unit, the detector or stylus assembly, a calibration reference, a calibration stand, the extension cable for the detector, charging hardware, multiple international plug adapters, a printed manual, and digital documentation. The extension cable is especially important for engine builders because it allows the detector to be separated from the main unit and positioned down inside a cylinder bore.

That detail matters. Measuring a flat coupon or deck surface is one thing. Measuring a cylinder wall requires getting the stylus into the bore, holding it steady, and allowing the motorized detector to trace the surface properly. The extension cable makes that possible.

The Color Touchscreen Is a Major Usability Upgrade

One of the most noticeable changes on the SJ-220 is the touchscreen interface. Earlier SJ-series units were menu-driven through buttons. They worked well, but setup and navigation could feel less intuitive, especially for users who did not use the tool every day.

The SJ-220’s color touchscreen makes it easier to move through menus, check traces, change settings, access calibration, and configure wireless features. For shops that use a profilometer regularly, this can save time. For users who are newer to surface finish measurement, the interface may also make the unit less intimidating.

Keith calls the SJ-220 the best handheld unit on the market, largely because it combines portability, capability, and modern usability in a compact tool. Although a skid-less profilometer is better, it's hard to argue with the price tag for the skidded SJ-220 that comes in 60-70% less than a skid-less.

Setup Still Matters

Even with a newer unit like the SJ-220, the fundamentals of setup still apply. The prior SJ-210 setup guidance remains useful because the same basic measuring principles carry over: the unit must be charged, calibrated, configured for the correct surface parameters, and used carefully.

In the earlier SJ-210 setup video, Keith emphasized that the battery should be kept charged because the unit stores customized settings. He also explained that the detector, or stylus, is a delicate and expensive part that should be handled carefully. The stylus should not be dropped, dragged through dirt, or used on an oily or contaminated surface. The cylinder should be clean before measurement, using a suitable cleaner and wipe-down procedure so the stylus is reading the surface finish rather than debris, oil, or honing residue.

That guidance applies just as much to the SJ-220. A profilometer is a precision instrument. If the stylus is damaged, contaminated, or used incorrectly, the readings will not be trustworthy.

Calibration Is the First Step

Before using a profilometer to measure a cylinder, it needs to be calibrated against a known reference. In the SJ-210 setup video, Keith used the supplied calibration reference and stand, noting that many of the references are around 116 Ra, though the exact value can vary slightly depending on the reference included with the unit. The calibration value printed on the reference is the value the profilometer should be set against.

During calibration, the stylus traces the reference surface and the unit compares the measured value to the known value. If the unit reads slightly off, it can be updated so it matches the calibration standard. Keith also points out that profilometer readings will not always be exactly identical on every pass. Small variations are normal. Large differences, however, can indicate a problem with the setup, the surface, or the stylus.

That is important when measuring cylinder bores. Surface finish is not a single perfect number everywhere in the bore. The goal is to measure consistently, understand the normal range, and identify whether the finish is appropriate for the application.

Important Surface Finish Parameters

For cylinder bore work, Keith’s SJ-210 setup focused on turning on the parameters most useful for engine builders: Ra, Rk, Rpk, and Rvk. Although the SJ-220 uses a new interface, those same measurements remain central to understanding bore finish.

Ra is the arithmetic average roughness. It is the most familiar surface finish number, but it does not tell the whole story. Two surfaces can have similar Ra values and still behave very differently with piston rings.

Rk represents the core roughness depth. It gives a better picture of the main working surface that supports the rings after the initial peaks have been worn or plateaued.

Rpk represents reduced peak height. This helps describe the remaining peaks on the surface. Too much peak height can increase ring wear during break-in.

Rvk represents reduced valley depth. This is especially important for oil retention. The valleys hold oil on the cylinder wall so the rings remain lubricated and sealed.

This is why Keith and Total Seal place so much emphasis on profilometer readings rather than visual inspection alone. A cylinder that “looks good” may not have enough valley depth. Another may have excessive peaks that create unnecessary ring wear. Without measurement, it is guesswork.

Measuring Inside the Cylinder Bore

When measuring a cylinder bore, the detector can be removed from the main profilometer body and connected with the extension cable. This allows the stylus to be positioned inside the cylinder. Keith also shows the value of a holding fixture that stabilizes the detector inside the bore. A steady fixture helps prevent false readings caused by hand movement.

The stylus itself is motorized. The user does not slide the whole unit up and down the bore. Instead, the detector performs the trace. If the operator moves the detector during the measurement, the reading can be distorted.

This is one reason technique matters. Clean the bore, position the detector carefully, keep it stable, and let the profilometer do the work.

What the Readings Tell You

In the SJ-210 setup example, Keith measured a diesel cylinder and reviewed the results for Ra, Rk, Rpk, and Rvk. He described the example finish as having a reasonable plateau, good valley depth, and a useful core number. That kind of interpretation is the real value of using a profilometer. The tool does not just produce numbers; it gives the engine builder a way to evaluate whether the honing process produced the desired surface.

The correct finish depends on the application. A naturally aspirated gasoline engine, turbocharged engine, methanol engine, racing engine, and street engine may not all want the same cylinder wall profile. Ring material, ring tension, cylinder material, honing abrasive, and intended use all matter.

This is also where Total Seal’s application-specific recommendations become valuable. The profilometer tells the builder what the surface is. The ring manufacturer’s recommendations help determine what the surface should be.

The SJ-220’s Connectivity Advantages

The SJ-220’s updated connectivity is one of its biggest advantages over older handheld units. USB-C charging and computer communication make it more convenient than previous models. The optional Bluetooth capability is also a major improvement for shops that want to collect readings wirelessly with compatible software.

For professional engine builders, documentation is becoming increasingly important. Being able to save and transfer surface finish data helps create build records, verify machining quality, and support quality control. When an engine leaves the shop, having actual measurements is far better than relying on notes that say the finish “looked good.”

A Better Tool for a More Demanding Job

Modern engine building has become more precise. Piston ring packages are thinner, cylinder materials vary widely, and expectations for power, durability, and oil control are higher than ever. Surface finish is no longer something that should be left to feel, appearance, or habit.

The Mitutoyo SJ-220 gives engine builders a modern handheld profilometer with updated controls, better usability, USB-C connectivity, optional Bluetooth, and the same basic measurement capability that made earlier Mitutoyo units so useful in the engine world. For anyone honing cylinders, checking finished bores, documenting surface finish, or troubleshooting ring seal issues, it is a serious tool.

Final Thoughts

Keith’s enthusiasm for the SJ-220 makes sense. A good profilometer helps take the guesswork out of cylinder finish. It allows the engine builder to confirm that the bore has the right balance of peaks, valleys, plateau, and core roughness for the ring package and application.

The older SJ-210 setup lessons still apply: calibrate the unit, protect the stylus, keep the surface clean, use the correct parameters, stabilize the detector, and understand that the numbers need to be interpreted in context. The SJ-220 simply brings those same essential practices into a newer, more capable handheld platform.

For engine builders serious about ring seal, horsepower, oil control, and durability, a profilometer is not optional. It is the measuring tool that shows whether the cylinder wall is ready to do its job.

Why a Porsche Oil Change Can Cost $800: Tony Callas Explains What Proper Service Really Involves

When Porsche Club of America Tech Committee Expert Tony Callas talks about an oil change, he is not talking about a quick drain-and-fill service. Callas, owner of Callas Rennsport and a longtime Porsche technician, trainer, race mechanic, and PCA presenter, uses the topic of the “$800 oil change” to explain a much bigger issue: modern Porsche service has become far more complex than many owners realize. 

For owners used to changing oil in older cars, the price of a professional Porsche oil change can seem hard to justify. But according to Callas, the oil itself is only part of the job. A proper oil service on a modern Porsche may include a test drive, controller scan, oil level calibration, safety inspection, radiator cleaning, cowl drain cleaning, battery evaluation, TPMS review, inspection for over-revs, and documentation of issues before and after the service. In other words, a good shop is not simply changing oil. It is evaluating the car.

The Oil Change Is Also a Diagnostic Visit

Callas explains that a reputable shop should test drive the car before touching it. This is not just for curiosity. It protects both the owner and the shop by documenting how the car arrived.

During the initial drive, a technician may check engine performance, braking, steering behavior, strange noises, HVAC operation, warning lights, throttle response, and whether the car tracks straight. This matters because many shops have heard some version of, “Ever since you worked on my car…” after a service visit. By recording pre-existing concerns, the shop can separate existing problems from anything related to the service.

That first step already takes time, but it is only the beginning.

Modern Porsches Need Computer Interrogation

Callas places special importance on controller interrogation. Modern Porsche vehicles contain many electronic modules, and an oil service can be an opportunity to scan those systems for faults or developing problems.

Using PIWIS, Durametric, or another capable diagnostic tool, a technician can inspect engine management faults, transmission faults, PDK data, PSM faults, air conditioning faults, airbag system concerns, battery condition, TPMS sensor life, OBD-II readiness status, and maintenance reminder status. On certain models, the technician may also review over-rev data and camshaft deviation values.

That information can be extremely valuable. A car may not have a warning light illuminated, yet still have stored faults or trends worth monitoring. Callas emphasizes that a skilled mechanic must also understand which faults matter and which are harmless anomalies. Reading codes is one thing. Interpreting them correctly is another.

Resetting Maintenance Lights Has Become More Complicated

One of Callas’s major points is that newer cars are creating new challenges for independent shops. He notes that 2024 and newer Porsche models may require newer PIWIS capability or Porsche’s virtual tester access to reset maintenance reminders properly.

He explains that independent shops can still access Porsche systems through J2534 pass-through equipment and Porsche’s online service access, but the shop has to know how to do it. This is one reason owners should be careful when choosing a service provider. A shop may be perfectly capable of draining and filling oil, but not properly equipped or trained to finish the service correctly on a late-model Porsche.

Setting the Oil Level Can Take an Hour

One of Callas’s biggest frustrations is the lack of a traditional dipstick on many modern Porsches. Electronic oil measurement can make the process slower and more delicate than owners expect.

He notes that setting your Porsche's oil level can take a long time, especially when small changes in oil quantity can move the reading from acceptable to overfilled. Some modern Porsches will even warn for a maximum oil level condition. That means the technician cannot simply pour in a fixed amount and assume the job is done.

Callas describes cases where overfilling caused serious problems, including a modern GT3 that would start and then stop because of excessive oil. The lesson is simple: correct oil level matters, and the process can be much more involved than it looks.

Proper Draining Takes Time

Callas recommends letting oil drain for approximately 45 minutes on water-cooled cars, especially later MA1-era engines. He says that over that extended drain period, another liter to liter and a half of oil may come out. That is time the shop cannot bill to another job if the technician or bay is tied up with the vehicle.

For a shop trying to do the job correctly, the process includes lifting the car safely, removing underbody panels where necessary, draining thoroughly, replacing the filter, inspecting the filter and oil, reinstalling components correctly, refilling with approved oil, warming the vehicle, and then setting the level carefully.

That is not the same service offered by a quick-lube shop.

Oil Analysis and Filter Inspection Matter

Callas recommends used oil analysis at every oil service. Used oil analysis can help monitor trends in wear metals, fuel dilution, contamination, and other indicators that may point toward developing problems.

He also discusses the importance of inspecting the oil filter. Some debris may be normal, especially in new engines, while other debris may signal a serious issue. But interpretation requires experience. Callas gives an example of a car that had been incorrectly diagnosed by another shop as needing an engine, when the debris shown did not support that conclusion.

This is another reason the person doing the service matters as much as the service itself. A technician must know the difference between normal debris, concerning debris, and misidentified material such as rubber from an O-ring.

A Real Oil Service Includes a Safety Inspection

Callas argues that a proper oil service should include a meaningful inspection of the car. He specifically mentions checking brake hoses, brake rotors, tires, wheels, axle boots, coolant reservoirs, coolant pumps, air filters, cowl drains, radiator areas, batteries, brake fluid, and other age-related or safety-related items.

These checks are not upsells when done properly. They are part of responsible Porsche ownership. Many of these cars are older than owners realize, and even newer cars can have issues related to plastic parts, rubber components, pothole damage, blocked radiators, or electronic system faults.

He also points out that some problems are not obvious unless the technician knows where to look. For example, radiators and condensers can collect leaves, dirt, and road debris. Cowl drains can clog and allow water to enter the car. Wheels can develop stress cracks. Tires can age out even if tread depth looks acceptable.

Brake Fluid, Batteries, and TPMS Sensors Should Not Be Ignored

Callas recommends changing brake fluid once a year if possible. He notes that moisture contamination and fluid degradation can create expensive problems, especially in more complex or valuable cars.

Battery condition is another recurring theme. Modern Porsches rely heavily on stable voltage. Callas explains that shops should use a proper power supply, not just a basic battery charger, when scanning or programming cars. With the key on and the engine off, modern vehicles can draw significant current because so many modules are awake. Voltage stability is critical when diagnostic equipment is connected.

TPMS sensors are also worth checking. Some diagnostic tools can show remaining sensor life. If a car is already getting new tires and the TPMS sensors are near the end of their life, replacing them during tire service may save labor later.

Oil Service Can Reveal Bigger Maintenance Needs

The oil change is often the moment when other issues become visible. Torn axle boots, leaking coolant reservoirs, aging brake lines, old tires, weak batteries, clogged radiators, cracked wheels, and fault codes may all appear during a thorough service.

Callas also warns that replacement parts are not always better than original parts. In some cases, he prefers cleaning and monitoring a minor issue rather than replacing an original component prematurely with an inferior replacement. This is the judgment that comes from decades of Porsche-specific experience.

Newer Porsche Models Raise the Stakes

Modern Porsche models can be extremely sensitive to incorrect service procedures. Callas gives a striking example involving hybrid models, where removing the oil filter too soon or spilling oil in the wrong area can damage the e-machine between the engine and transmission. He describes the potential cost as tens of thousands of dollars.

He also warns about air suspension concerns, Porsche approved oil requirements, oil filters, and the importance of using parts and fluids that protect both the car and the shop from warranty or liability issues.

For newer Porsches, especially expensive GT cars, Callas says he uses Porsche-approved oils and genuine Porsche oil filters. The point is not that every aftermarket filter is automatically bad, but that the risk is not worth jeopardizing a customer’s car or the shop’s reputation.

Why the Cheapest Oil Change May Not Be the Best Value

Callas tells owners to be careful when shopping only by price. A low-cost oil change may not include diagnostic scans, oil analysis, filter inspection, radiator cleaning, cowl drain cleaning, road testing, or careful oil level setting. It may also be performed by someone without Porsche-specific tools or training.

His point is not that every expensive shop is good or every inexpensive shop is bad. Rather, owners should ask what is included. If a shop charges a premium, it should be doing premium work. If a Porsche oil change costs $800, Callas says the shop had better be performing the inspections and procedures that justify that price.

DIY Owners Can Still Learn From This

Callas is not dismissive of DIY owners. In fact, much of his presentation is educational. Many items he discusses can be checked by an attentive owner: tire date codes, cowl drain cleanliness, radiator debris, brake fluid condition, battery age, tire cracking, coolant reservoir condition, and obvious leaks.

However, DIY owners also need to understand the limits of a basic oil change. On late-model cars, diagnostic access, electronic oil measurement, maintenance reset procedures, and voltage support may require specialized tools. A DIY oil change can still be done, but owners should know what they are not checking if they skip the diagnostic and inspection portions of the service.

Tony Callas, PCA Tech Committee Expert

Oil Change Intervals: Tony’s Recommendation

Callas recommends changing oil every 3,000 to 5,000 miles, or at least once a year. He rejects the idea that synthetic oil can simply stay in service because it does not “wear out” in the traditional sense. Oil becomes contaminated with fuel, moisture, carbon, and other byproducts.

He also recommends driving the car long enough to reach full operating temperature so moisture can burn off. Short trips, cold starts, fuel dilution, and contamination all matter, especially in high-performance engines.

For a new Porsche, Callas recommends an early first oil change at around 700 miles because of the amount of break-in metal that can appear in the oil and filter.

The Bigger Lesson

Tony Callas’s presentation is ultimately about trust, knowledge, and procedure. A proper Porsche oil change is not just a commodity service. It is a chance to inspect, document, diagnose, and protect a complex performance car.

Owners should understand what they are paying for. A basic drain and fill should not cost the same as a complete Porsche oil service with road testing, diagnostic scanning, oil analysis, filter inspection, safety checks, cleaning, documentation, and precise level setting. At the same time, a high price only makes sense if the shop actually performs those steps.

For Porsche owners, the takeaway is clear: do not ask only, “How much is an oil change?” Ask what the service includes, what tools the shop uses, whether they understand your specific model, whether they inspect the oil filter, whether they perform a diagnostic scan, and whether they know how to set the oil level correctly.

As Callas makes clear, modern Porsche service is no longer simple. The cars are more capable than ever, but they are also more complex. Maintaining them properly requires time, equipment, experience, and Porsche-specific knowledge. That is why a proper oil change can cost far more than expected—and why, when done correctly, it may be worth it.

Tony Callas is the owner of Callas-Rennsport, located in Torrance, CA.

Modern Fuels vs. Classic Fuel Systems: Keeping Older Cars Running Right

 

Modern Fuels vs. Classic Fuel Systems: Keeping Older Cars Running Right

Today’s gasoline is very different from the fuel older cars were designed to use. While modern blends improve emissions and efficiency, they can create challenges for classic vehicles with original fuel systems.

Understanding these differences is key to preserving reliability.

One of the biggest changes is the widespread use of ethanol. Most pump fuel now contains ethanol, which behaves differently than pure gasoline. It absorbs moisture from the air, which can lead to corrosion inside fuel tanks, lines, and carburetors—especially in vehicles that are not driven regularly. This is even the case with Top Tier fuels.

For older cars, this moisture absorption can result in phase separation, where water and ethanol separate from the gasoline. When this happens, the fuel system may draw in a mixture that doesn’t burn properly, leading to poor performance or even engine damage.

Material compatibility is another concern. Many classic fuel systems were built with rubber components, seals, and hoses that were never intended to handle ethanol-blended fuels. Over time, these materials can degrade, crack, or become brittle, increasing the risk of leaks and failures.

Fuel volatility has also changed. Modern gasoline is formulated for contemporary engines and emissions systems, which can affect how it vaporizes and burns in older designs. This can lead to drivability issues, including hard starting, vapor lock, or inconsistent idle quality.

Storage plays a critical role as well. Vehicles that sit for extended periods are especially vulnerable to fuel degradation. As fuel ages, it can form deposits and varnish that clog carburetors, injectors, and fuel passages. Ethanol can accelerate this process if moisture is present. That's why you need to use fuel stabilizers if the fuel is going to sit in your tank over a month, especially in humid climates.

To mitigate these issues, maintenance and preparation are essential. Using fresh fuel, monitoring storage conditions, and ensuring the fuel system is in good condition can go a long way toward preventing problems.

Upgrading certain components may also be beneficial. Replacing old fuel lines, seals, and hoses with modern ethanol-compatible materials can improve durability and reduce the likelihood of leaks or failures.

For enthusiasts who drive their vehicles infrequently, stabilizing fuel and managing storage conditions can help maintain fuel quality over time. Regular operation, when possible, is also beneficial to keep systems functioning properly.

For older engines and fuel systems not designed for modern ethanol-blended fuels, the use of purpose-built fuel additives can provide an added layer of protection. Products like Driven’s Carb Defender and Injector Defender are complete fuel system cleaners formulated with PEA (polyetheramine) to help counteract the negative effects of ethanol by stabilizing fuel, reducing moisture-related corrosion, and improving combustion quality. These additives can also help protect sensitive components such as carburetors, injectors, seals, and fuel lines, while minimizing deposit formation during storage or intermittent use. For pre-2000 vehicles in particular, incorporating a high-quality fuel additive into regular maintenance can help maintain drivability, extend component life, and reduce the risk of fuel-related issues associated with today’s gasoline blends.

Ultimately, modern fuel isn’t inherently harmful—but it does require a different approach when used in older vehicles. By understanding how today’s gasoline interacts with classic fuel systems, owners can take the necessary steps to protect performance and longevity.

The Porsche PPI Most Buyers Skip—and Why It Can Cost Them

 

The Porsche PPI Most Buyers Skip—and Why It Can Cost Them

A Porsche pre-purchase inspection (PPI) is one of the most important steps when buying a used Porsche. Yet many buyers either rush the process or rely on incomplete inspections—often overlooking the very checks that matter most.

The result can be costly.

A typical PPI focuses on visible condition, service history, and a general mechanical review. While these are important, they don’t always uncover deeper issues that can lead to major engine problems. In many cases, the most critical diagnostics require a more specialized approach.

One commonly missed step is proper cylinder inspection. Engines in certain Porsche models are known to experience issues such as cylinder wall wear or scoring. These problems are not always obvious during a standard inspection and can exist even in cars that otherwise appear well maintained.

Without a borescope inspection, these issues can go undetected until symptoms become severe—often after the purchase is complete.

Another overlooked area is oil analysis. Evaluating the condition of the engine oil can provide valuable insight into internal wear, contamination, and overall engine health. It’s a relatively simple step that can reveal problems not visible during a visual inspection.

Equally important is understanding known platform-specific concerns. Every generation of Porsche has its own set of common issues, whether related to engine design, cooling systems, or drivetrain components. A generic inspection that doesn’t account for these factors may miss early warning signs.

Documentation review is also frequently underestimated. Service records can help establish whether preventative maintenance has been performed or if known issues have already been addressed. Gaps in documentation can be just as telling as physical defects.

For buyers, the key takeaway is that not all PPIs are created equal. A thorough inspection should go beyond a checklist and include targeted diagnostics based on the specific model being evaluated.

Skipping these deeper steps may save time upfront, but it increases the risk of unexpected repairs and long-term ownership costs.

A properly executed PPI provides more than peace of mind—it offers a clearer picture of the car’s true condition. For high-performance vehicles like Porsche models, that level of insight is essential.

In the end, investing in a comprehensive vehicle inspection is far less expensive than dealing with the consequences of missed issues after the purchase.

Euro vs. US Oil Standards: Why ACEA and API Don’t Align

 

Euro vs. US Oil Standards: Why ACEA and API Don’t Align

Engine oil specifications are not universal. In fact, one of the most common sources of confusion among enthusiasts and professionals alike is the difference between European (ACEA) and American (API) oil standards.

While both systems aim to define oil performance, they are built around very different priorities.

In the United States, API standards are largely driven by fuel economy, emissions compliance, and broad compatibility across a wide range of vehicles. These specifications emphasize lower viscosity oils and reduced levels of certain additives—particularly phosphorus and zinc—to protect catalytic converters and improve efficiency.

By contrast, European ACEA standards tend to prioritize engine protection, durability, and high-performance operation. Many European engines are designed with higher loads, extended drain intervals, and tighter tolerances, which require oils with greater stability under stress.

One of the key differences lies in high-temperature performance. ACEA specifications often require higher High-Temperature High-Shear (HTHS) viscosity, which helps maintain a stronger oil film under demanding conditions. This is especially important in engines that operate at higher sustained speeds or under increased thermal load.

Additive packages also differ significantly. API oils, particularly in modern formulations, often limit anti-wear additives like ZDDP to meet emissions requirements. ACEA oils, depending on the specification, may allow more robust additive packages to support long-term engine protection.

Another important distinction is how the standards are tested. ACEA specifications generally include more stringent requirements for oxidation resistance, deposit control, and extended service intervals. This reflects the longer oil change intervals commonly recommended by European manufacturers.

For performance engines, these differences matter. Choosing an engine oil based solely on viscosity or brand can overlook the underlying specification that determines how the oil behaves under real-world conditions.

This is particularly relevant for engines that are prone to wear-related issues or operate under higher stress. Oil selection can influence everything from ring sealing and deposit formation to long-term durability.

It’s also important to note that not all oils meet both standards equally. Some formulations are designed to satisfy API requirements but fall short of ACEA performance levels, while others are engineered specifically for European applications.

Understanding these distinctions allows owners and builders to make more informed decisions. Rather than focusing on marketing claims, evaluating the actual specification provides better insight into how an oil will perform.

Ultimately, the difference between ACEA and API comes down to design philosophy. One prioritizes efficiency and emissions, while the other emphasizes protection and endurance. Knowing which standard aligns with your engine’s needs is critical to achieving the best results. 

Following that up with used oil analysis ensures you are using the best oil for your engine based on how you drive your car.