Marine Diesel Trunk Piston Oil 40TBN SAE 50

Marine Diesel Trunk Piston Oil 40TBN SAE 50 is a premium-grade system oil designed for medium-speed trunk piston diesel engines running on very high-sulfur residual fuels. With a Total Base Number (TBN) of 40, this oil delivers maximum acid neutralization capacity, offering superior corrosion protection and extending both engine and oil life in the most demanding marine environments.

The SAE 50 viscosity offers a heavier-duty film for enhanced protection in high-load, high-temperature operations, making it well-suited for vessels operating under constant, extreme conditions. This oil is formulated with an advanced additive package that keeps pistons, ring belts, and crankcases clean by minimizing carbon deposits, sludge, and varnish formation.

Marine operators benefit from reduced maintenance intervals, cleaner engine internals, and extended drain capabilities, especially when using low-quality or high-contaminant fuels. This oil meets the stringent performance needs of marine applications where reliability, durability, and top-tier protection are critical.

Key Benefits:

• Ultra-high 40 TBN for superior corrosion resistance in high-sulfur environments

• SAE 50 viscosity for robust film strength and thermal stability

• Exceptional detergency and dispersancy to keep engines clean

• Strong oxidation resistance for longer oil life and reduced maintenance

• Tailored for medium-speed trunk piston marine diesel engines in severe service