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  • AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil


    • Outstanding extreme-pressure protection
    • Delivers 6X more wear protection1
    • Maintains proper viscosity (thickness)
    • Minimizes oil consumption
    • Maximizes fuel efficiency
    • Excels in extreme temperatures
    • Confidently extend drain intervals

       

      1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 5W-30 as worst-case representation

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    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
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    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
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  • AMSOIL Signature Series 5W-40 100% Synthetic Max-Duty Diesel Oil


    • Outstanding extreme-pressure protection
    • Delivers 6X more wear protection1
    • Maintains proper viscosity (thickness)
    • Minimizes oil consumption
    • Maximizes fuel efficiency
    • Excels in extreme temperatures
    • Confidently extend drain intervals

       

      1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 5W-30 as worst-case representation

    View Detail Page
    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
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    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
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  • AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil


    4.8 star rating
    • Outstanding extreme-pressure protection
    • Delivers 6X more wear protection1
    • Maintains proper viscosity (thickness)
    • Minimizes oil consumption
    • Maximizes fuel efficiency
    • Excels in extreme temperatures
    • Confidently extend drain intervals

       

      1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 5W-30 as worst-case representation

    View Detail Page
    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
    Save: $3.20 Learn More
    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
    Save: $3.20 Learn More
  • AMSOIL Signature Series 5W-30 100% Synthetic Max-Duty Diesel Oil


    • Outstanding extreme-pressure protection
    • Delivers 6X more wear protection1
    • Maintains proper viscosity (thickness)
    • Minimizes oil consumption
    • Maximizes fuel efficiency
    • Excels in extreme temperatures
    • Confidently extend drain intervals

       

      1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 5W-30 as worst-case representation

    View Detail Page
    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
    Save: $3.20 Learn More
    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
    Save: $3.20 Learn More
  • AMSOIL Signature Series 10W-30 100% Synthetic Max-Duty Diesel Oil


    • Outstanding extreme-pressure protection
    • Delivers 6X more wear protection1
    • Maintains proper viscosity (thickness)
    • Minimizes oil consumption
    • Maximizes fuel efficiency
    • Excels in extreme temperatures
    • Confidently extend drain intervals

       

      1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 5W-30 as worst-case representation

    View Detail Page
    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
    Save: $3.20 Learn More
    Current price:

    $17.99

    Retail Price (CAD)
    Preferred Price: $14.79
    Save: $3.20 Learn More
  • AMSOIL 15W-40 Heavy-Duty 100% Synthetic Diesel Oil


    • Delivers 4X more wear protection1
    • Minimizes oil consumption
    • Excels in extreme temperatures
    • Helps keep trucks and equipment operating at peak performance
    • Offers outstanding value

      1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation

    View Detail Page
    Current price:

    $12.09

    Retail Price (CAD)
    Preferred Price: $9.89
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    Current price:

    $12.09

    Retail Price (CAD)
    Preferred Price: $9.89
    Save: $2.20 Learn More
  • AMSOIL 5W-40 Heavy-Duty 100% Synthetic Diesel Oil


    • Delivers 4X more wear protection1
    • Minimizes oil consumption
    • Excels in extreme temperatures
    • Helps keep trucks and equipment operating at peak performance
    • Offers outstanding value

      1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation

    View Detail Page
    Current price:

    $12.09

    Retail Price (CAD)
    Preferred Price: $9.89
    Save: $2.20 Learn More
    Current price:

    $12.09

    Retail Price (CAD)
    Preferred Price: $9.89
    Save: $2.20 Learn More
  • AMSOIL 10W-30 Heavy-Duty 100% Synthetic Diesel Oil


    • Delivers 4X more wear protection1
    • Minimizes oil consumption
    • Excels in extreme temperatures
    • Helps keep trucks and equipment operating at peak performance
    • Offers outstanding value

      1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation

    View Detail Page
    Current price:

    $12.09

    Retail Price (CAD)
    Preferred Price: $9.89
    Save: $2.20 Learn More
    Current price:

    $12.09

    Retail Price (CAD)
    Preferred Price: $9.89
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  • AMSOIL 0W-20 100% Synthetic Diesel Oil


    • Outstanding protection for smaller American diesel pickups, vans, cars and SUVs
    • Delivers up to 6X more wear protection than required by a leading industry standard1
    • Retains viscosity for added engine protection and increased fuel economy
    • Excels in hot and cold temperature extremes
    • Minimizes oil consumption

      1based on third-party testing in the OM646LA cam wear test using 0W-20 as worst-case representation

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    Current price:

    $17.49

    Retail Price (CAD)
    Preferred Price: $14.39
    Save: $3.10 Learn More
    Current price:

    $17.49

    Retail Price (CAD)
    Preferred Price: $14.39
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  • AMSOIL 5W-30 100% Synthetic Diesel Oil


    • Outstanding protection for smaller American diesel pickups, vans, cars and SUVs
    • Delivers up to 6X more wear protection than required by a leading industry standard1
    • Retains viscosity for added engine protection and increased fuel economy
    • Excels in hot and cold temperature extremes
    • Minimizes oil consumption

      1based on third-party testing in the OM646LA cam wear test using 0W-20 as worst-case representation

    View Detail Page
    Current price:

    $16.59

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    Preferred Price: $13.59
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    Current price:

    $16.59

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    Preferred Price: $13.59
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  • AMSOIL 5W-30 LS 100% Synthetic European Motor Oil


    • Designed for the unique demands of gasoline, diesel and hybrid European vehicles.
    • European formula features precise blend of synthetic base oils and premium additives.
    • Exceptional engine protection without harming emissions systems.

    This product has been reformulated using higher-quality components. Because these components are not original equipment manufacturer (OEM) approved, this product no longer carries an OEM license. It remains suitable for use in applications that specify OEM-licensed oils and continues to be supported by the AMSOIL Limited Warranty.

    View Detail Page
    Current price:

    $19.69

    Retail Price (CAD)
    Preferred Price: $16.09
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    Current price:

    $19.69

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    Preferred Price: $16.09
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  • AMSOIL 5W-40 MS 100% Synthetic European Motor Oil


    • Designed for the unique demands of gasoline, diesel and hybrid European vehicles.
    • European formula features precise blend of synthetic base oils and premium additives.
    • Exceptional engine protection without harming emissions systems.

    This product has been reformulated using higher-quality components. Because these components are not original equipment manufacturer (OEM) approved, this product no longer carries an OEM license. It remains suitable for use in applications that specify OEM-licensed oils and continues to be supported by the AMSOIL Limited Warranty.

    View Detail Page
    Current price:

    $18.59

    Retail Price (CAD)
    Preferred Price: $15.29
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    Current price:

    $18.59

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    Preferred Price: $15.29
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  • AMSOIL 5W-40 FS 100% Synthetic European Motor Oil


    • Designed for the unique demands of gasoline, diesel and hybrid European vehicles.
    • European formula features precise blend of synthetic base oils and premium additives.
    • Exceptional engine protection without harming emissions systems.

    This product has been reformulated using higher-quality components. Because these components are not original equipment manufacturer (OEM) approved, this product no longer carries an OEM license. It remains suitable for use in applications that specify OEM-licensed oils and continues to be supported by the AMSOIL Limited Warranty.

    View Detail Page
    Current price:

    $14.49

    Retail Price (CAD)
    Preferred Price: $11.89
    Save: $2.60 Learn More
    Current price:

    $14.49

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    Preferred Price: $11.89
    Save: $2.60 Learn More
  • AMSOIL 0W-40 FS 100% Synthetic European Motor Oil


    • Designed for the unique demands of gasoline, diesel and hybrid European vehicles.
    • European formula features precise blend of synthetic base oils and premium additives.
    • Exceptional engine protection without harming emissions systems.
    View Detail Page
    Current price:

    $17.59

    Retail Price (CAD)
    Preferred Price: $14.39
    Save: $3.20 Learn More
    Current price:

    $17.59

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    Preferred Price: $14.39
    Save: $3.20 Learn More
  • AMSOIL 15W-40 Heavy-Duty Diesel and Marine Oil


    • Recommended for applications specifying API CI-4+ and prior specifications
    • Controls soot and wear
    • Reduces oil consumption and emissions
    • Delivers maximum engine protection over extended drain intervals
    • Provides outstanding protection and performance in temperature extremes
    • Try Signature Series Max-Duty 15W-40 for a serious upgrade

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    Current price:

    $18.89

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    Current price:

    $18.89

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  • AMSOIL Premium Protection 20W-50 100% Synthetic Motor Oil


    • High-zinc formula guards against wear
    • Ideal for flat-tappet cams
    • Resists deposits to help keep engines clean
    • Convenience of use for gas and diesel engines
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    $19.69

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    Current price:

    $19.69

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    Preferred Price: $16.19
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  • AMSOIL Premium Protection 10W-40 100% Synthetic Motor Oil


    • High-zinc formula guards against wear
    • Ideal for flat-tappet cams
    • Resists deposits to help keep engines clean
    • Convenience of use for gas and diesel engines
    View Detail Page
    Current price:

    $18.79

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    Preferred Price: $15.39
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    Current price:

    $18.79

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    Preferred Price: $15.39
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  • AMSOIL DOMINATOR® 20W-50 Competition Diesel Oil


    The Confidence to Compete, The Protection To Win

    • Specifically designed for high-HP diesel engines
    • Outstanding bearing protection under extreme loading
    • Delivers 50% more film thickness1
    • Robust viscosity control

    1compared to the 3.5cP HTHS limit for SAE 15W-40

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    Current price:

    $81.09

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    $81.09

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  • AMSOIL DOMINATOR® 5W-20 100% Synthetic Racing Oil


    • Formulated specifically for racing & high-performance engines
    • Robust formulation resists viscosity loss
    • Proprietary friction modifier maximizes horsepower & torque
    • Fortified with anti-wear additives for extra protection
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    Current price:

    $22.39

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    Current price:

    $22.39

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  • AMSOIL DOMINATOR® 10W-30 100% Synthetic Racing Oil


    Provides superior performance and maximum protection in high-performance and racing applications. DOMINATOR is engineered from advanced synthetic technology to better withstand the elevated rpm, high temperatures and shock-loading common to racing applications.
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    $21.69

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Synthetic Diesel Oil

Can diesel oil safely be use in gas engines?

It depends on the specifications the diesel oil carries and the recommendation of the original equipment manufacturer (OEM). The American Petroleum Institute (API) publishes its “C” category of specifications for diesel oil (currently CK-4) and its “S” category for gasoline motor oil (currently SP).

You can use diesel oil in a gas engine provided the diesel oil meets the appropriate specifications and viscosity requirements of your engine. For example, if your gas engine calls for a 5W-30 motor oil that meets the API SN specification, you can safely use a diesel oil of the correct viscosity that meets the API SN spec. For the typical gasoline application, however, a diesel oil isn’t required, and the more appropriate choice is a quality gasoline motor oil for both performance and value.

Why do diesel engines need specific oil?

Outside of differences in the fuel, the most notable difference between diesel and gas engines is the way each ignites the fuel. Diesel engines compress air in the combustion chamber until the temperature of the air increases enough to ignite the fuel (sprayed into the combustion chamber by the injector). Gasoline engines, on the other hand, use spark plugs that ignite a mixture of fuel and air at just the right time.

Diesel oil is formulated differently than gasoline oil in order to address issues specific to diesel engines, including higher engine temperatures, oxidation rates, soot levels and deposits. Find the best AMSOIL synthetic diesel oil for your application in the Product Lookup. AMSOIL diesel fuel additives also provide benefits designed to keep diesel engines operating at top performance.

How often should you perform a diesel oil change?

Refer to the vehicle owner’s manual for specific oil-change recommendations. AMSOIL synthetic diesel oils may be used beyond the OEM-recommended interval based on the service-life recommendations on the data sheets or with oil analysis. In addition, AMSOIL offers a full line of premium synthetic gear oil and transmission fluid to keep your diesel running at peak performance.