15W-40 Synthetic Heavy-Duty Diesel and Marine Oil

15W-40 Synthetic Heavy-Duty Diesel and Marine Oil Engineered for pre-2007 diesel engines in on-road applications as well as all model year diesel engines in off-road applications. High 12 TBN controls acids from combustion blow-by and EGR. Additives control soot thickening, oxidation and wear. Extended drain capabilities reduce downtime and motor oil expenses.
AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is a premium diesel oil providing excellent performance in all types of diesel engines where highly effective control of wear and deposits is vital. Engineered with heavy-duty dispersant/detergent additives, its Total Base Number (TBN) of 12 neutralizes acids and controls soot thickening from Exhaust Gas Recirculation (EGR) and blow-by to protect against corrosion, cylinder bore polishing (wear) and varnish/sludge deposits. AMSOIL 15W-40 Diesel Oil resists heat and breakdown better than conventional petroleum oils for long-lasting performance and protection.