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Buy AMSOIL diesel motor oil for Cummins, Powerstroke, and Duramax engines at the lowest prices in Canada.

​Shop for AMSOIL 0W-40, 5W-40, 15W-40 and more for light and HD Diesels.
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AMSOIL Signature Series Max-Duty Synthetic Diesel Oil 15W-40
Product Code: DMEQT-EA
​Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil.  AMSOIL Canada's 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.
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil
​5W-40
Product Code: DEOQT-EA
​Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Canada's 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.
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil
​0W-40
Product Code: DZFQT-EA
​Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Canada's 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.
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil
​5W-30
Product Code: DHDQT-EA
​Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Canada's 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.
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil 10W-30
Product Code: DTT1G-EA
​Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Canada's 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.
AMSOIL Heavy-Duty Synthetic Diesel Oil 15W-40
Product Code: ADPQT-EA
​AMSOIL Canada's Heavy-Duty Synthetic Diesel Oil is formulated for hardworking equipment. It is engineered to provide 4X better wear protection1, giving you the edge to keep trucks and equipment operating at peak performance. Heavy-Duty Synthetic Diesel Oil offers outstanding value and provides excellent protection for customers seeking an upgrade over conventional, synthetic-blend or competing synthetic diesel oils.
AMSOIL Heavy-Duty Synthetic Diesel Oil 5W-40
Product Code: ADOQT-EA
​AMSOIL Canada's Heavy-Duty Synthetic Diesel Oil is formulated for hardworking equipment. It is engineered to provide 4X better wear protection1, giving you the edge to keep trucks and equipment operating at peak performance. Heavy-Duty Synthetic Diesel Oil offers outstanding value and provides excellent protection for customers seeking an upgrade over conventional, synthetic-blend or competing synthetic diesel oils.
​AMSOIL Heavy-Duty Synthetic Diesel Oil 10W-30
Product Code: ADNQT-EA
​AMSOIL Canada's Heavy-Duty Synthetic Diesel Oil is formulated for hardworking equipment. It is engineered to provide 4X better wear protection1, giving you the edge to keep trucks and equipment operating at peak performance. Heavy-Duty Synthetic Diesel Oil offers outstanding value and provides excellent protection for customers seeking an upgrade over conventional, synthetic-blend or competing synthetic diesel oils.
AMSOIL DOMINATOR 20W-50 Competition Diesel Oil
Product Code: DCOQT-EA
​AMSOIL Canada's DOMINATOR® 20W-50 Competition Diesel Oil is designed for professionals and enthusiasts who want a step up in diesel protection.  It is specifically designed for high-horsepower diesel engines and delivers the benefits most important to diesel competitors, including robust durability, outstanding bearing protection and the ability to withstand the extreme pressures and temperatures common to diesel competition.
AMSOIL SAE 15W-40 Heavy-Duty Diesel and Marine Oil
​Product Code: AMEQT-EA
AMSOIL Canada engineered the SAE 15W-40 Heavy-Duty Diesel and Marine Oil for pre-2007 diesel engines in on-road applications as well as all model year diesel engines in off-road applications.  It's 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 Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil
Product Code: HDDQT-EA
AMSOIL Canada engineered Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil for pre-2007 diesel engines in on-road applications as well as all model year diesel engines in off-road applications.  It is also engineered for all gasoline engines recommending API SL specifications including turbo-charged vehicles.  Provides superior wear protection and fuel efficiency.
AMSOIL 10W-30/SAE 30 Synthetic Heavy-Duty Diesel Oil
Product Code: ACD1G-EA
​AMSOIL Canada's 10W-30/SAE 30 Synthetic Heavy-Duty Diesel Oil exceeds both 10W-30 multi-grade and SAE 30 straight-grade viscosity requirements.  It provides outstanding performance in pre-2007 diesel engines in on-road applications as well as all model-year diesel engines in off-road apps.  Also recommended for gasoline engines requiring API SL or previous specifications.
AMSOIL Premium Protection 20W-50 Synthetic Motor Oil
Product Code: AROQT-EA
​AMSOIL Canada's Premium Protection 20W-50 Synthetic Motor Oil is ideal for use in both diesel and gasoline engines.  It is 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.
AMSOIL Premium Protection 10W-40 Synthetic Motor Oil
Product Code: AMOQT-EA
​AMSOIL Canada's Premium Protection 10W-40 Synthetic Motor Oil is 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 of modern equipment and compatible with some motorcycles.