Heavy Duty 10W-30 line - many use as a fleet or all-purpose oil. We get many customers which this is the only AMSOIL product they buy.
Premium Protection 20W-50 Synthetic Motor Oil For use in both diesel and gasoline engines. Traditional Pre 2000's type of formulation.
SAE 15W-40 Heavy-Duty Diesel and Marine Motor 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.
