Diesel Motor Oils

Amsoil Signature Series Max-Duty Synthetic Diesel Oil 5W-40

Premium API CJ-4 Synthetic 5W-40 Diesel Oil Maximum Fuel Economy and Extended Drain Intervals in Ultra-Low Emission Diesel Engines

Amsoil Signature Series Max-Duty Synthetic Diesel Oil 15W-40

Premium API CJ-4 Synthetic 15W-40 Diesel Oil The premium choice diesel oil for model-year 2007 and newer heavy-duty and pickup truck diesel engines requiring API CJ-4 emission-quality oil standards.

Premium Protection 20W-50 Synthetic Motor Oil

Premium Protection 20W-50 Synthetic Motor Oil For use in both diesel and gasoline engines. Ideal for applications where the extra protection of a higher-viscosity oil is desired. The higher viscosity may help reduce motor oil consumption in equipment experiencing higher than normal oil usage rates while running lower viscosity lubricants.

Synthetic 15W-40 Diesel and Marine Motor Oil

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.

Synthetic 10W-30 SAE 30 Heavy Duty Motor Oil

Synthetic SAE 10W-30/SAE 30 Heavy-Duty Motor Oil Designed to Outperform Conventional Diesel Oils Exceeds both 10W-30 multi-grade and SAE 30 straight-grade viscosity requirements. Provides outstanding performance in pre-2007 diesel engines.

Series 3000 SAE 5W-30 Synthetic Heavy Duty Diesel Oil

Series 3000 SAE 5W-30 Synthetic Heavy Duty Diesel (and Gasoline) Oil - Maximum Fuel Economy and Excellent Anti-Wear Protection. Engineered for pre-2007 diesel engines. One of the most versicle AMSOIL products.