5.0 / 5.0
(3) 3 total reviews
Full synthetic, friction-modified 5W-30 diesel engine oil for all API CK-4 heavy duty diesel engines equipped with DPF, SCR and EGR systems. Ideal for diesel pick-ups (Powerstroke, Duramax, Cummins), semis, heavy equipment. Volvo, CAT, Ford, GMC and many others.
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Description
TRIAX Fleet Supreme synthetic diesel engine oils are the top choice for maximizing engine performance. These are state-of-the-art engine oils are built with performance as a priority while maintaining complete OEM spec compliance. TRIAX Fleet Supreme oils are fully formulated products synthetics, designed for complete API CK-4 compliance and exceed OEM specifications for advanced turbocharged diesel engines, such as Volvo, Cummins, Detroit Diesel, Mercedes Benz and Ford fitted with exhaust after-treatment devices such as DPF and SCR.
The ideal choice for long haul trucks, pickups, including Powerstroke, Duramax, Cummins and many others.
- Excellent durability even in adverse conditions such as towing, hauling,
- High shear stability, stays in grade even under high loads and temperatures
- Exceeds all CK-4 related OEM specifications.
- 48% less wear vs the CK-4 specification requirements.
- Noticeably quieter engine operation • Faster, quieter turbo charger spooling
- Eliminates stiction in HEUI injectors
- Large specification coverage across many OEMs.
- Extended drain intervals: 25,000 miles for pickups and over 100,000 miles for long haul semi trucks.
Available Viscosity Grades: 5W-40, 10W-30, 15W-40 and 5W-30
Specifications
- API CK-4, CI-4 and CI-4 Plus
- API SN, SL (15W-40, 5W-30)
- Military Specification MIL-PRF-2104K
- Caterpillar ECF-3
- Volvo VDS-3, VDS-4, VDS-4.5
- ACEA E7, E9-12
- Mercedes Benz MB 228.51, 228.31
See data sheet for all specs.
OEM Cross-Reference
• Mobil Delvac 5W-30

I don’t switch oils easily, so trying Triax Fleet Supreme 5W30 took some thought.
The API SN rating is what sold me. All my vehicles call for SN, so I know this fits exactly what they were designed for. That matters to me.
I know SP and SQ oils are more tailored for modern GDI turbo engines, but I like that I can still get a more robust oil that fits my cars without overthinking it.
So far it’s been smooth, quiet, and uneventful in the best way.
I use this brand oil for years with my semitruck, best quality and price
good oil for small diesels, quiets them down some
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Manufactured in the USA