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Turbo-Diesel Truck Diesel Engine Oil

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

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


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

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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$14.69

Retail Price (USD)
Preferred Price: $11.19
Save: $3.50 Learn More
Signature Series Max-Duty Synthetic Diesel Oil 5W-40

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


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

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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$14.99

Retail Price (USD)
Preferred Price: $11.39
Save: $3.60 Learn More
Signature Series Max-Duty Synthetic Diesel Oil 0W-40

Signature Series Max-Duty Synthetic Diesel Oil 0W-40


• Delivers 4X better cold-temperature performance1
Provides long-lasting engine protection
Maintains proper viscosity (thickness)
Minimizes oil consumption
Maximizes fuel efficiency

1When compared to SAE 15W-40 oil in the ASTM D5293 Cold Cranking Viscosity test

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$14.99

Retail Price (USD)
Preferred Price: $11.59
Save: $3.40 Learn More
Signature Series Max-Duty Synthetic Diesel Oil 5W-30

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


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

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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$15.29

Retail Price (USD)
Preferred Price: $11.69
Save: $3.60 Learn More
Signature Series Max-Duty Synthetic Diesel Oil 10W-30

Signature Series Max-Duty Synthetic Diesel Oil 10W-30


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

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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$59.59

Retail Price (USD)
Preferred Price: $45.89
Save: $13.70 Learn More
Heavy-Duty Synthetic Diesel Oil 15W-40

Heavy-Duty Synthetic Diesel Oil 15W-40


• 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

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$10.49

Retail Price (USD)
Preferred Price: $7.79
Save: $2.70 Learn More
Heavy-Duty Synthetic Diesel Oil 5W-40

Heavy-Duty Synthetic Diesel Oil 5W-40


• 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

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$10.89

Retail Price (USD)
Preferred Price: $8.09
Save: $2.80 Learn More
ADOQT-EA

$10.89

Retail Price (USD)
Preferred Price: $8.09
Save: $2.80 Learn More
Heavy-Duty Synthetic Diesel Oil 10W-30

Heavy-Duty Synthetic Diesel Oil 10W-30


• 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

$10.49

Retail Price (USD)
Preferred Price: $7.79
Save: $2.70 Learn More
ADNQT-EA

$10.49

Retail Price (USD)
Preferred Price: $7.79
Save: $2.70 Learn More
SAE 15W-40 Heavy-Duty Diesel and Marine Oil

SAE 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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$15.29

Retail Price (USD)
Preferred Price: $11.79
Save: $3.50 Learn More
Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil

Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil


Available While Supplies Last
AMSOIL Series 3000 5W-30 Synthetic Diesel Oil is discontinued and available while supplies last. For a serious upgrade, try Signature Series Max-Duty 5W-30.

Recommended for applications specifying API CI-4+ and prior specifications
Extends drain intervals and maximizes fuel economy
Controls soot-thickening and wear
Reduces oil consumption and emissions
Excels in extreme temperatures
Try Signature Series Max-Duty 5W-30 for a serious upgrade

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$64.49

Retail Price (USD)
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.
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$15.99

Retail Price (USD)
Preferred Price: $12.29
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Premium Protection 10W-40 Synthetic Motor Oil

Premium Protection 10W-40 Synthetic Motor Oil


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.
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$15.39

Retail Price (USD)
Preferred Price: $11.79
Save: $3.60 Learn More
DOMINATOR 20W-50 Competition Diesel Oil

DOMINATOR 20W-50 Competition Diesel Oil


The Confidence to Compete, The Protection To Win

AMSOIL 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.
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$16.79

Retail Price (USD)
Preferred Price: $12.99
Save: $3.80 Learn More
DCOQT-EA

$16.79

Retail Price (USD)
Preferred Price: $12.99
Save: $3.80 Learn More
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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.