Triax 15W-40 Full-Synthetic Diesel Engine Oil 1 Gallon — API CK-4, Extended Drain & Moly-Boron

Triax Fleet Supreme 15W-40 API CK-4 is a full-synthetic, friction-modified heavy-duty diesel engine oil engineered to reduce wear, improve turbo response, and extend drain intervals for modern diesel trucks.

Built for fleet and owner-operator use, this 1-gallon formulation blends nano-boron and molybdenum friction modifiers with high-shear-stable base stocks to deliver consistent viscosity, cooler operation, and quieter running under heavy loads. It meets API CK-4 performance requirements and is formulated for applications where extended drain intervals, improved fuel economy, and aggressive wear protection matter most.

How does Triax Fleet Supreme protect my engine under towing or heavy load?

The oil emphasizes extreme film strength and low friction to resist metal-to-metal contact during high-stress conditions like towing, hauling, or long highway runs. Improved shear stability keeps viscosity within spec over time so protective films remain intact.

• Nano-boron and moly friction modifiers reduce wear and lower friction.
• High film strength protects bearings, cam lobes, and turbo components.
• Maintains viscosity under thermal stress for long-term protection.

Can I use this oil in my Ford, Chevy, GMC, or Dodge diesel pickup?

Yes — Triax Fleet Supreme is formulated to be compatible with a wide range of heavy-duty diesel pickups including Ford Powerstroke, Chevrolet/GMC Duramax, and Dodge Ram Cummins engines. It meets API CK-4 baselines and is suitable where 15W-40 viscosity is specified.

• API CK-4 performance level for contemporary diesel engines.
• Safe for turbocharged and naturally aspirated diesel engines.
• Works in on- and off-road duty cycles when 15W-40 is recommended.

What performance and economy benefits can I expect?

Triax targets lower operating temperatures, quieter engine operation, and measurable fuel efficiency gains through reduced friction. Fleet tests indicate multi-percent improvements in fuel use and faster turbo spool-up, which can translate to real-world savings over long service intervals.

• Lower friction coefficient for improved MPG and quicker turbo response.
• Quieter operation and reduced heat during heavy use.
• Extended drain capability for less downtime and lower maintenance costs.

How long can drain intervals be with this synthetic 15W-40 oil?

Triax Fleet Supreme is designed for extended drains when used in compatible equipment and monitored properly. Typical recommendations depend on duty cycle and oil analysis, but the formula supports substantially longer intervals than conventional oils.

• Highways/semi applications: capable of exceeding 100,000 miles under planned maintenance.
• Super Duty pickups: support for up to 30,000-mile intervals in many conditions.
• Oil analysis advised to validate intervals based on load, fuel, and service history.

Who is this for: Triax Fleet Supreme 15W-40 is aimed at professional fleets, owner-operators, and pickup owners who need robust wear protection, extended service intervals, and improved fuel economy without changing engine hardware. It’s especially relevant for drivers who tow frequently, operate under sustained heavy loads, or want a high-shear-stability oil that maintains protective viscosity over long distances. Always follow your engine manufacturer’s viscosity and service recommendations and use oil analysis when extending drain intervals.