TriboDyn TRI-EX² 15W-40 Synthetic Blend Heavy Duty Motor Oil
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TriboDyn TRI-EX² 15W-40 is a synthetic blend heavy-duty diesel oil engineered with patented ceramic coating technology — the first oil to receive a United States Functional Patent in over 30 years. This advanced formulation actively bonds to metal surfaces, creating a self-lubricating ceramic film that reduces friction and wear under extreme pressure and heat. This technology is particularly valuable in diesel engines because it can help repair worn metal surfaces and reduce blow-by, a common issue that leads to power loss and increased oil consumption.
As a synthetic blend, this product offers the proven benefits of ceramic technology at a more accessible price point, making it ideal for fleet operations and budget-conscious equipment owners. Meeting or exceeding API CK-4 (the latest standard for diesel engines), API SN, and ACEA E9/E7/E4/E2 specifications, this 15W-40 oil is specifically designed for modern low-emission diesel engines equipped with EGR and DPF systems, while remaining fully backward compatible with older diesel engines.
It provides superior soot control, high detergency to keep pistons clean, and excellent TBN retention for extended drain intervals.
Key Benefits:
- Patented ceramic coating technology that helps repair worn surfaces and reduce blow-by
- Synthetic blend 15W-40 CK-4 offering ceramic benefits at a more accessible price
- Ideal for fleet operations and budget-conscious equipment owners
- Superior soot control and high detergency for clean pistons
- Excellent TBN retention for extended drain intervals
- Compatible with EGR and DPF systems
- Backward compatible with older diesel engines
Recommended Applications: Ideal for heavy-duty trucks, construction equipment, agricultural machinery, and fleet operations where a cost-effective synthetic blend with ceramic protection is desired.
Technical Specifications – TriboDyn® TRI-EX2 15W-40 Synthetic Blend HD Motor Oil
Viscosity @ 100°C (ASTM D445): 15.5 cSt
Viscosity @ 40°C (ASTM D445): 116.1 cSt
Viscosity Index (ASTM D2270): 143
Pour Point (ASTM D97): -33°F (-36°C)
Flash Point (COC) (ASTM D92): 435°F (224°C)
API Gravity (ASTM D4052): 32.1
CCS Viscosity @ -30°C (ASTM D5293): 5,398 cP
TBN (Total Base Number) (ASTM D2896): 10
Meets or exceeds the following specifications:
API CK-4 (backward compatible with CJ-4 and older categories)
ACEA E9, E7, E4, E2 • Cummins CES 20086, 20081, 20077, 20076
Mack EOS 4.5, EO-O Premium Plus-07, EO-N Premium Plus 03
Volvo VDS-4.5, VDS-4, VDS-3, VDS-2 • Mercedes Benz MB 228.3, 228.31, 228.5, 229.1, 229.5
Caterpillar ECF-3, ECF-2, ECF-1a • Detroit Diesel 93K222, 93K218, 93K215, 93K214
MAN 3575, 3275, 270 • MTU 2.1 Type I & Type II • Allison C-4 • JASO DH-1 & DH-2, and many others.
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Why TriboDyn TRI-EX2 15W-40 synthetic blend is the ultimate diesel engine oil
Patented Ceramic Coating Technology
Actively forms a self-lubricating ceramic film on metal surfaces under heat and pressure, repairing micro-pits and scratches left by previous oils — dramatically reducing internal friction.
Maximum Fuel Economy & MPG Gains
Dramatically reduces internal friction, delivering real-world fuel mileage improvements of 4–8% and better throttle response in modern high output diesel engines.
Ultimate High-Mileage Oil
The patented ceramic coating actively repairs small pits, scratches, and wear scars inside your engine, restoring compression, power, and performance — making TRI-EX² 15W40 the ultimate high-mileage motor oil for vehicles kept on the road longer.
Measurable Horsepower Increases
Independent dyno testing proves TRI-EX² delivers real, measurable horsepower gains. The patented ceramic coating dramatically reduces internal friction, allowing your engine to produce more usable power while maintaining superior protection and efficiency.
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Meets or Exceeds Demanding Industry Specifications
API CK-4, CJ-4, CI-4 Plus, CI-4 • ACEA E7, E9 • MB 228.51, 228.31 • Volvo VDS-4.5, VDS-4 • Mack EOS-4.5 • Cummins CES 20086 • Detroit Diesel DFS 93K222
100% Customer Satisfaction
Hundreds of 5-star reviews • Perfect 100% rating on eBay for over 5 years. You are buying the worlds best oil, our shipping speed, packing, and service is 2nd to none.
Made in the USA
Exclusively manufactured in our own ISO 9001 certified facility. Unmatched purity and quality in every drop.
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Safety Data Sheet (SDS)
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Frequently Asked Questions
Yes. This oil is formulated with strong soot dispersancy additives that help keep soot particles suspended, reducing abrasive wear inside the engine. Combined with excellent film strength and our patented ceramic coating, it provides solid protection against the increased wear that soot can cause — especially in high-mileage or work trucks.
It performs very well under demanding conditions. The robust additive package and high film strength help maintain protection during high-temperature operation and heavy towing. Many users report consistent performance and reduced engine stress when pulling heavy loads.
Yes, for many applications. Our 15W-40 Synthetic Blend delivers excellent protection, strong soot control, and reliable performance under load at a more accessible price point than full synthetic. It’s a smart choice for fleets, work trucks, and high-mileage diesels where you want strong performance and good value.
Yes. The ceramic coating actively seeks out and forms a protective layer on worn or high-friction surfaces inside the engine. This helps reduce wear, improve smoothness, and extend engine life — especially beneficial for higher-mileage diesels that have accumulated wear over time.
Many users successfully run longer drain intervals with this oil, thanks to its strong additive package and good oxidation stability. However, we always recommend following your engine manufacturer’s guidelines and considering your operating conditions, load, and oil analysis results when extending drains.
All TriboDyn TRI-EX² motor oils are proudly manufactured in our own ISO 9001 certified facility in the United States by a team of experienced tribologists who have engineered lubricants for aerospace, racing, and heavy industry for decades.
