Diesel Motor Oils

Amsoil Signature Series Max-Duty Synthetic Diesel Oil 5W-30

Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Signature Series Max-Duty 5W-30 Synthetic Diesel Oil delivers 6X better wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222.

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

synthetic diesel oil. AMSOIL Signature Series Max-Duty Synthetic Diesel Oil delivers 6X better wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222. Advanced synthetic technology provides excellent viscosity control and outstanding extreme-temperature performance, while minimizing oil consumption. The result: protection that’s boosted to the max.

Premium Protection 20W-50 Synthetic Motor Oil

Premium Protection 20W-50 Synthetic Motor Oil For use in both diesel and gasoline engines. Traditional Pre 2000's type of formulation.

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.


  • 1
  • 2