Cerma
Ceramic Engine Treatment for Diesel Engines
Ceramic Engine Treatment for Diesel Engines
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Cerma STM-3 Ceramic Engine Treatment for Diesel Engines — One-Time Nano Silicon Carbide Protection
Cerma STM-3® Diesel Engine Treatment is a one-time ceramic application that permanently bonds Nano Silicon Carbide (SiC) to the internal metal surfaces of any diesel engine — cars, pickup trucks, semi trucks, marine vessels, heavy equipment, and generators. Add it to your engine oil. Drive normally. The SiC particles do the rest.
One application delivers permanent ceramic protection that survives every oil change for the life of the engine. No reapplication. No disassembly. No downtime.
✅ What Cerma STM-3 Does for Your Diesel Engine
- Protects new engines and revives high-mileage diesels — restores compression and smoothness
- Increases horsepower and torque — less friction means more power to the wheels or PTO
- Improves fuel economy up to 21%* — significant savings for diesel vehicles with high fuel costs
- Reduces emissions by up to 92%* — cleaner combustion from optimized metal surfaces
- Boosts compression — SiC fills micro-imperfections in cylinder walls and piston rings
- Eliminates carbon deposits — ceramic barrier prevents buildup
- Reduces engine vibration and noise — smoother surfaces for quieter diesel operation
- Prevents hydrogen embrittlement — protects metal integrity at the molecular level
- Stops cold start problems — ceramic protection present from first crank, even at -40°F
- Lowers operating temperatures — critical for diesels running under sustained heavy load
💡 Why diesel owners choose Cerma: Diesel engines run higher compression, higher heat, and harder loads than gasoline engines — making ceramic protection even more impactful. For high-fuel-consumption trucks and fleet vehicles, fuel economy improvements can pay for the treatment many times over.
🔬 How STM-3 Technology Works
Cerma STM-3® is not a traditional oil additive. It does not coat engine parts temporarily — it permanently changes the surface structure of the metal itself.
The Nano Silicon Carbide (SiC) particles penetrate into the sub-surfaces of your engine's metal components and create a permanent Silicon Carbide ceramic matrix. SiC has a Mohs hardness of 9.5 (just below diamond) and a melting point of 2,730°C — far exceeding any operating temperature in a diesel engine.
The result: permanently smoother, harder, more durable metal surfaces on cylinders, pistons, rings, bearings, and cams — without changing factory tolerances. Friction drops dramatically. Wear virtually stops. Performance improves measurably.
Cerma STM-3® contains 100% active ingredient — no fillers, no solvents, no petroleum additives. It does not modify your oil. It enhances your engine's metal. Safe for DPF, DOC, SCR, EGR, and all emissions equipment.
📋 How to Apply
- Change your oil — use any diesel-rated motor oil at your next scheduled oil change
- Add Cerma STM-3 — pour the correct dose (see sizing below) into your oil fill port
- Drive normally — the SiC particles will bond to metal surfaces during normal operation
- Enjoy permanent protection — the ceramic matrix is now part of your engine. No reapplication needed
Noticeable improvement in engine smoothness, vibration, and noise within the first 20 minutes of driving. Full ceramic bonding develops over the first 3,000–5,000 miles. Compatible with conventional, synthetic, and synthetic blend diesel oils. Safe for all plastics, rubber, and seals.
📦 Dosage Guide — Choose Your Diesel Engine Size
| Size | Engine Displacement | Best For | Price |
|---|---|---|---|
| 2 oz | 1.0 – 2.8L diesel | Small diesel cars (VW TDI, BMW diesel, etc.) | $105.60 |
| 4 oz | 3.0 – 4.8L diesel | Mid-size diesel trucks & SUVs (Colorado, Titan, etc.) | $195.80 |
| 6 oz | 5.0 – 7.3L diesel | Full-size diesel pickups (Ram Cummins, Ford Power Stroke, Duramax) | $290.40 |
| 12 oz | 8.0L+ diesel | Semi trucks, Class 8, heavy equipment, generators | $538.45 |
Not sure which size? Check your engine displacement in your owner's manual, on the engine label, or call us at 239-344-9861. For gasoline engines, see Cerma Gas Engine Treatment — one size ($105.60) treats all gas engines.
🛡️ Cerma STM-3 vs Traditional Diesel Additives
| Feature | Cerma STM-3® | AMSOIL / Lucas / Hot Shot's |
|---|---|---|
| Technology | Nano Silicon Carbide (SiC) | Petroleum / chemical additives |
| How It Works | Bonds ceramic to metal surfaces | Coats or suspends in oil |
| Application | ✅ One-time (permanent) | ❌ Every oil change |
| Survives Oil Changes | ✅ Yes — bonded to metal | ❌ No — drains out |
| Restores Compression | ✅ Yes | ❌ No |
| Fuel Economy Improvement* | Up to 21% | 2–5% typical |
| Emission Reduction* | Up to 92% | Minimal |
| Non-Newtonian (Dilatant) | ✅ Yes — more protection under load | ❌ No — Newtonian fluids |
Read the full comparison: Cerma STM-3 vs AMSOIL →
🚛 Who Uses Cerma Diesel Treatment
- Pickup truck owners — Ram Cummins, Ford Power Stroke, Chevy Duramax, Nissan Titan XD
- Semi truck operators — owner-operators and fleets (Peterbilt, Kenworth, Freightliner, Volvo, Mack)
- Diesel car owners — VW TDI, BMW diesel, Mercedes diesel, Audi diesel
- Marine — diesel inboard and outboard marine engines
- Heavy equipment — Caterpillar, John Deere, Kubota, Bobcat
- Generators — standby and portable diesel generators
- Fleet managers — delivery trucks, service vehicles, transit buses
🔗 Complete Diesel Protection
Cerma STM-3 Diesel Engine Treatment protects from the oil side. For total coverage, add:
- Cerma Diesel Fuel Treatment — continuous ceramic fuel system cleaning and lubrication
- Cerma Transmission Treatment — one-time ceramic protection for automatic/manual transmissions ($70.40 cars, $193.60 semis)
- Cerma Gear Box / Axle Treatment — ceramic protection for differentials and transfer cases
- Cerma Synthetic Motor Oil — SiC-enhanced diesel oil with extended change intervals
🔬 Technical & Compatibility FAQs
Choose based on your engine displacement: 2oz for 1.0–2.8L (small diesel cars), 4oz for 3.0–4.8L (mid-size trucks), 6oz for 5.0–7.3L (full-size diesel pickups like Cummins, Power Stroke, Duramax), and 12oz for 8.0L+ (semi trucks and heavy equipment). Check your owner's manual or call 239-344-9861 if unsure.
Yes. The SiC particles permanently bond to your engine's internal metal surfaces, creating a ceramic matrix within the sub-surface of the metal. This bond survives oil changes — when you drain and replace the oil, the ceramic protection stays on the metal permanently. No reapplication needed for the life of the engine.
Yes. Cerma STM-3® Diesel Engine Treatment is safe for all modern high-pressure common rail (HPCR) diesel systems operating at 30,000+ PSI — including Bosch, Denso, and Delphi injection systems found in Cummins 6.7L, Ford Power Stroke 6.7L, Duramax 6.6L, and VW TDI engines. Cerma treats internal engine metal surfaces (cylinders, rings, bearings) from the oil side — it does not interact with high-pressure fuel system components.
Yes — diesels with oil consumption or compression loss often see the most dramatic improvement. Both issues typically stem from worn cylinder walls, degraded piston rings, or worn valve seals. As Cerma's SiC particles bond to these worn surfaces, many diesel owners report reduced oil consumption, restored compression, and smoother operation within the first 3,000–5,000 miles. Cerma is not a mechanical repair — but for engines with moderate wear, it's a fraction of the cost of a rebuild and often delivers years of extended service life.
Results vary by engine condition, age, and driving habits. Cerma internal testing shows diesel fuel economy improvements up to 21%*. Even a conservative 5–10% improvement on a diesel truck averaging 15 MPG and driving 20,000 miles/year at $4.00/gal saves approximately $267–$533 annually — paying for the 6oz treatment in the first year. Fleet operators running higher annual mileage see proportionally larger savings.
Yes. Cerma STM-3® Diesel Engine Treatment is compatible with all approved diesel fuels including standard ULSD, biodiesel blends (B5, B20), and renewable diesel (R99, R100). Because Cerma treats metal surfaces from the oil side, it does not interact with fuel chemistry. In fact, biodiesel and renewable diesel's slightly reduced lubricity make ceramic engine protection more beneficial — Cerma's permanent SiC coating compensates for the lower natural lubricity of alternative diesel fuels.
Cerma STM-3® does not modify your engine oil — it treats the metal surfaces. Under the Magnuson-Moss Warranty Act, aftermarket products cannot void a manufacturer's warranty unless the product itself causes the damage. We recommend consulting your dealer if you have specific warranty concerns before application.
The SiC ceramic coating on your engine's metal surfaces is permanent and always present — even when the engine is cold. On startup in extreme cold, the ceramic barrier is already protecting metal-on-metal contact surfaces before oil can circulate. This is especially valuable for diesel owners in cold climates, where oil thickening at low temperatures traditionally causes the majority of cold-start engine wear.
Backed by over 12 years of real-world data and verified performance claims. Made in the USA by Cerma Treatment (Bijou Inc.), Fort Myers, FL. Fully insured in the US and abroad.
30-day return policy. Free shipping on orders over $150. Ships to US & Canada. Questions? Call 239-344-9861 or email info@cermatreatment.com.
*Performance claims (fuel economy improvement up to 21%, emission reduction up to 92%) are based on Cerma internal testing and customer-reported results. Individual results vary based on engine condition, age, driving habits, load, and maintenance practices. Claims are representative and not guaranteed for every application.
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Frequently Asked Questions
I have used this diesel treatment several times. The first was in a Vw diesel that accidentally had gasoline put in it. After that it used some oil but a treatment of Cerma stopped that and we put another 90k miles on it.
The other was a Kubota diesel in a lawnmower. Several times it was overheated but the Cerma treatment slowed the oil consumption considerably. Still running smoothly after 23 years.