Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Signature Series Max-Duty Synthetic Diesel Oil delivers 4X better cold-temperature performance when compared to SAE 15W-40 ...

Formulated for Excellent Diesel Engine Protection and Performance

Package sizes include:

1-Quart Bottle
1-Quart Bottles (case of 12)
1-Gallon Bottle
1-Gallon Bottles (case of 4)
2.5-Gallon Bot...

For use in both gasoline and diesel engines. Offers multi-functionality and wear protection. Ideal for applications where the extra protection of a higher-viscosity oil is desired. Excellent for motor homes and older vehicles, as well as many types o...

AMSOIL Heavy-Duty Synthetic Diesel Oil is formulated for hard-working equipment. It is engineered to provide 4X better wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222, giving you the edge to keep tr...

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. Exten...

Formulated for Excellent Diesel Engine Protection and Performance. AMSOIL OE Synthetic Diesel Oil provides excellent protection and performance in both on- and off-road diesel engines for the original equipment manufacturer’s recommended drain inte...

AMSOIL Heavy-Duty Synthetic Diesel Oil is formulated for hard-working equipment. It is engineered to provide 4X better wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222, giving you the edge to keep tr...

Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Signature Series Max-Duty Synthetic Diesel Oil delivers 6X better wear protection than required by the Detroit Diesel DD13 ...

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 rat...

Maximum Fuel Economy and Excellent Anti-Wear Protection. Engineered for pre-2007 diesel engines in on-road applications as well as all model year diesel engines in off-road applications. Also engineered for all gasoline engines recommending API SL sp...

Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Signature Series Max-Duty Synthetic Diesel Oil delivers 6X better wear protection than required by the Detroit Diesel DD13 ...

AMSOIL Heavy-Duty Synthetic Diesel Oil is formulated for hard-working equipment. It is engineered to provide 4X better wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222, giving you the edge to keep tr...

Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Signature Series Max-Duty Synthetic Diesel Oil delivers 6X better wear protection than required by the Detroit Diesel DD13 ...

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 in on-road applications as well as all model-year diesel en...

European Car Formula 0W-40 Classic Emissions System Protection Synthetic Motor Oil (EFO) is a Full-SAPS European motor oil for European Gasoline and Diesel Engines.

Formulated for the lubrication needs of European gasoline and diesel c...

European Car Formula 5W-30 Improved Emissions System Protection Synthetic Motor Oil (AEL) is a Low-SAPS synthetic motor oil. Provides exceptional performance and protection for high-performance European vehicles....

European Car Formula 5W-40 Classic Emissions System Protection Synthetic Motor Oil (EFM) is a Full-SAPS synthetic motor oil, specially formulated for the lubrication needs of European gasoline and diesel cars and light trucks. Its full sulfated ash, ...

European Car Formula 5W-40 Improved Emissions System Protection Synthetic Motor Oil (AFL) is a Mid-SAPS synthetic motor oil is specially formulated for the lubrication needs of modern European gasoline and diesel cars and light trucks. Formulated wit...