Marine Diesel Trunk Piston Oil 40TBN SAE 40

Marine Diesel Trunk Piston Oil 40TBN SAE 40 is a high-performance system oil engineered for large trunk piston diesel engines operating on very high-sulfur residual fuels in deep-sea or heavy-duty marine applications. With a Total Base Number (TBN) of 40, it provides exceptional acid neutralization, protecting critical engine components from corrosion and extending both engine and oil life.

The SAE 40 viscosity grade ensures optimal lubrication and film strength under high loads and extreme temperatures, while the advanced additive system enhances cleanliness by minimizing carbon deposits, varnish, and sludge.

This oil is especially well-suited for vessels operating in regions where high-sulfur fuels are still in use and where long drain intervals and engine reliability are mission-critical. It helps reduce wear, prevent liner lacquering, and maintain peak engine performance.

Key Benefits:

• Ultra-high 40 TBN neutralizes acids from very high-sulfur fuels

• Excellent corrosion protection for pistons, liners, and bearings

• Enhanced detergency for cleaner engines and reduced maintenance

• Outstanding oxidation and thermal stability for extended oil life

• Designed for use in trunk piston marine engines in demanding service conditions

Recommended for marine operators requiring maximum alkalinity reserve and performance from a SAE 40 system oil under high sulfur and severe-duty fuel conditions.