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AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil
Product code : DZFQT-EA
AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil
Product code : DZFQT-EA
Current price:
$15.79
Retail Price
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Estimated delivery by Mon, Jun 8
to Columbus - 43215.
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- 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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We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.
-
We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.
About this item
-
Developed to protect the horsepower diesel enthusiasts crave and extend the life of hard-working commercial equipment in the most severe conditions. Signature Series synthetic technology delivers max-duty protection in on- and off-road applications.
See the Product Data Bulletin for full details.
MAXIMUM ENGINE PROTECTION
- Delivers 4X better cold-temperature performance1
- Provides long-lasting wear protection, keeping cylinder liners looking like new2
- Delivers up to 60 percent better turbo cleanliness3
- Withstands the extra demands you place on the turbo when pulling heavy loads or updating the tune for maximum horsepower
- Provides up to 2X better rust protection4
1When compared to SAE 15W-40 oil in the ASTM D5293 Cold Cranking Viscosity test
2Based on independent testing of AMSOIL 5W-30 Signature Series Max-Duty Synthetic Diesel Oil and a leading conventional 15W-40 diesel oil using the Detroit Diesel* DD13 Scuffing test for specification DFS 93K222.
3Based on specification standards of CAT C13 2nd Ring Top Land Carbon testing
4Based on industry standard testing using the NMMA FC-W Rust Test.
AMSOIL FIGHTS WEAR
AMSOIL delivers powerful engine protection. How good is it? In third-party testing compared to a leading brand, AMSOIL provided long-lasting wear protection, keeping cylinder liners looking like new.DD
![AMSOIL Fights Wear – AMSOIL delivers powerful engine protection. How good is it? In third-party testing compared to a leading brand, AMSOIL provided long-lasting wear protection, keeping cylinder liners looking like new.]( "AMSOIL Fights Wear – AMSOIL delivers powerful engine protection. How good is it? In third-party testing compared to a leading brand, AMSOIL provided long-lasting wear protection, keeping cylinder liners looking like new.")
DDBased on third-party testing of AMSOIL 5W-30 Signature Series Max-Duty Synthetic Diesel Oil and a leading conventional 15W-40 diesel oil using the Detroit Diesel* DD13 Scuffing test for specification DFS 93K222. *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.
KEEPS TURBOS CLEAN
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil provides protection boosted to the max, delivering up to 60% better turbo cleanlinessJ and withstanding the extra demands you place on the turbo when pulling heavy loads or updating the tune for maximum horsepower.
JBased on specification standards of CAT C13 2nd Ring Top Land Carbon testing
PROTECTS AGAINST RUST
Provides up to 2X better rust protection.K
![Protects Against Rust – Provides up to 2X better rust protection.]( "Protects Against Rust – Provides up to 2X better rust protection.")
K Based on industry standard testing using the NMMA FC-W Rust Test.
VISCOSITY CONTROL
- Resists oxidation and the thickening effects of soot contamination
- Retains viscosity after high-temperature service for maximum engine protection and efficiency
- Provides up to 76 percent less oil consumption5
5Than required by the API CK-4 standard in the Caterpillar-1N oil consumption test
REDUCES OIL CONSUMPTION
Signature Series Max-Duty Synthetic Diesel Oil provides up to 76% less oil consumption.L
![Reduces Oil Consumption – Signature Series Max-Duty Synthetic Diesel Oil provides up to 76% less oil consumption.]( "Reduces Oil Consumption – Signature Series Max-Duty Synthetic Diesel Oil provides up to 76% less oil consumption.")
LThan required by the API CK-4 standard in the Caterpillar-1N oil consumption test.
EXCELS IN EXTREME TEMPERATURES
- Provides outstanding protection and performance in hot and cold temperature extremes
- Resists thermal (heat) breakdown better than conventional and competing synthetic diesel oils.
- Stays fluid in sub-zero temperatures for easier starting, improved oil flow and reduced wear.
EXCELS IN EXTREME COLD
AMSOIL 0W-40 Signature Series Max-Duty Synthetic Diesel Oil delivers 4X better cold-temperature performance when compared to SAE 15W-40 oil in the ASTM D5293 Cold Cranking Viscosity test.
-
Data Bulletin
Literature Sample
Warranty
SDS
-
-
star rating
Great oil… no filters?By JASON, a Verified Buyer on May 21, 2026I’ve been using AMSOIL now for about 20k miles and it’s great. Only problem is that the only filters ever available are the junk Wix filters. I tried it a couple times and am not impressed. The AMSOIL filters are much better but haven’t been in stock the last 3 times I’ve ordered oil. Hopefully the supply issues are resolved soon.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
2.5 gal containersBy LesF, a Verified Buyer on May 17, 2026Love the oil, however had a hard time pouring the oil. Container is large and somewhat awkward to pour even with a funnel on the Ford 6.7L engine. Think I’ll stick with the 1 gal jugs.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best there isBy SCOTT, a Verified Buyer from Carrollton on May 17, 2026Keeps the 6.7 running beautifully Good stuff. 200k and climbingBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
2016 F350 6.7 PowerstrokeBy ROBERT, a Verified Buyer from St. Augustine, FL on May 13, 2026I have used this since 2018. I follow the severe maintenance schedule for my truck due my driving style. It works great and I Love the convenience of having it sent to my house.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
AMSOIL SIGNATURE SERIESBy BILL, a Verified Buyer from Idaho on May 10, 2026Expensive but cheaper than buying a new engine.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
All I use is AmsoilBy KEVIN, a Verified Buyer from Barrie Ontario on May 04, 2026Not much I need to say the product itself speaks for itself since I’ve switched to Amsoil I’ve seen a change in the way my engine runs and very impressed how the oil holds outBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great oilBy SCOTT, a Verified Buyer from Arkansas on May 04, 2026I’ve been an AMSOIL dealer for years, great products, great service and fast shipping, can’t get much better then that.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Why did I wait so long???By JEREMY, a Verified Buyer on May 04, 2026I have owned diesel trucks since 2006. Made my first AMSOIL purchase and am now wondering why it took me so long to switch. Excellent product. Super fast shipping. Great price. Oil and filter “kits” ready for my specific make/model. Yes please and thank you!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Max duty L5PBy Eddie, a Verified Buyer from Oklahoma on May 03, 2026Great oil and product at a good price. I don’t get the dreaded L5P typewriter tick and I don’t have to add an oil stabilizer any time of the year. Really happy with the product and definitely recommend it to everyone!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best OilBy PORTER, a Verified Buyer from New Mexico on May 02, 2026AMSOIL is hands down the best oil I’ve ever used. From the quality of the oil, the service company provides, to the random gifts you get sometimes. I constantly recommend AMSOIL!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Data Bulletins-
- 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
-
We offer easy returns for customers. If your product is unused and unopened, you may return it within 30 days for a full refund of the purchase price. View full AMSOIL Return Policy.
-
We accept Visa, Mastercard, American Express, Discover and PayPal, and provide secure checkout and encrypted payment processing.
-
Developed to protect the horsepower diesel enthusiasts crave and extend the life of hard-working commercial equipment in the most severe conditions. Signature Series synthetic technology delivers max-duty protection in on- and off-road applications.
See the Product Data Bulletin for full details.
MAXIMUM ENGINE PROTECTION
- Delivers 4X better cold-temperature performance1
- Provides long-lasting wear protection, keeping cylinder liners looking like new2
- Delivers up to 60 percent better turbo cleanliness3
- Withstands the extra demands you place on the turbo when pulling heavy loads or updating the tune for maximum horsepower
- Provides up to 2X better rust protection4
1When compared to SAE 15W-40 oil in the ASTM D5293 Cold Cranking Viscosity test
2Based on independent testing of AMSOIL 5W-30 Signature Series Max-Duty Synthetic Diesel Oil and a leading conventional 15W-40 diesel oil using the Detroit Diesel* DD13 Scuffing test for specification DFS 93K222.
3Based on specification standards of CAT C13 2nd Ring Top Land Carbon testing
4Based on industry standard testing using the NMMA FC-W Rust Test.
AMSOIL FIGHTS WEAR
AMSOIL delivers powerful engine protection. How good is it? In third-party testing compared to a leading brand, AMSOIL provided long-lasting wear protection, keeping cylinder liners looking like new.DD
![AMSOIL Fights Wear – AMSOIL delivers powerful engine protection. How good is it? In third-party testing compared to a leading brand, AMSOIL provided long-lasting wear protection, keeping cylinder liners looking like new.]( "AMSOIL Fights Wear – AMSOIL delivers powerful engine protection. How good is it? In third-party testing compared to a leading brand, AMSOIL provided long-lasting wear protection, keeping cylinder liners looking like new.")
DDBased on third-party testing of AMSOIL 5W-30 Signature Series Max-Duty Synthetic Diesel Oil and a leading conventional 15W-40 diesel oil using the Detroit Diesel* DD13 Scuffing test for specification DFS 93K222. *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.
KEEPS TURBOS CLEAN
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil provides protection boosted to the max, delivering up to 60% better turbo cleanlinessJ and withstanding the extra demands you place on the turbo when pulling heavy loads or updating the tune for maximum horsepower.
JBased on specification standards of CAT C13 2nd Ring Top Land Carbon testing
PROTECTS AGAINST RUST
Provides up to 2X better rust protection.K
![Protects Against Rust – Provides up to 2X better rust protection.]( "Protects Against Rust – Provides up to 2X better rust protection.")
K Based on industry standard testing using the NMMA FC-W Rust Test.
VISCOSITY CONTROL
- Resists oxidation and the thickening effects of soot contamination
- Retains viscosity after high-temperature service for maximum engine protection and efficiency
- Provides up to 76 percent less oil consumption5
5Than required by the API CK-4 standard in the Caterpillar-1N oil consumption test
REDUCES OIL CONSUMPTION
Signature Series Max-Duty Synthetic Diesel Oil provides up to 76% less oil consumption.L
![Reduces Oil Consumption – Signature Series Max-Duty Synthetic Diesel Oil provides up to 76% less oil consumption.]( "Reduces Oil Consumption – Signature Series Max-Duty Synthetic Diesel Oil provides up to 76% less oil consumption.")
LThan required by the API CK-4 standard in the Caterpillar-1N oil consumption test.
EXCELS IN EXTREME TEMPERATURES
- Provides outstanding protection and performance in hot and cold temperature extremes
- Resists thermal (heat) breakdown better than conventional and competing synthetic diesel oils.
- Stays fluid in sub-zero temperatures for easier starting, improved oil flow and reduced wear.
EXCELS IN EXTREME COLD
AMSOIL 0W-40 Signature Series Max-Duty Synthetic Diesel Oil delivers 4X better cold-temperature performance when compared to SAE 15W-40 oil in the ASTM D5293 Cold Cranking Viscosity test.
-
Data Bulletin
Literature Sample
Warranty
SDS
-
-
star rating
Great oil… no filters?By JASON, a Verified Buyer on May 21, 2026I’ve been using AMSOIL now for about 20k miles and it’s great. Only problem is that the only filters ever available are the junk Wix filters. I tried it a couple times and am not impressed. The AMSOIL filters are much better but haven’t been in stock the last 3 times I’ve ordered oil. Hopefully the supply issues are resolved soon.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
2.5 gal containersBy LesF, a Verified Buyer on May 17, 2026Love the oil, however had a hard time pouring the oil. Container is large and somewhat awkward to pour even with a funnel on the Ford 6.7L engine. Think I’ll stick with the 1 gal jugs.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best there isBy SCOTT, a Verified Buyer from Carrollton on May 17, 2026Keeps the 6.7 running beautifully Good stuff. 200k and climbingBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
2016 F350 6.7 PowerstrokeBy ROBERT, a Verified Buyer from St. Augustine, FL on May 13, 2026I have used this since 2018. I follow the severe maintenance schedule for my truck due my driving style. It works great and I Love the convenience of having it sent to my house.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
AMSOIL SIGNATURE SERIESBy BILL, a Verified Buyer from Idaho on May 10, 2026Expensive but cheaper than buying a new engine.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
All I use is AmsoilBy KEVIN, a Verified Buyer from Barrie Ontario on May 04, 2026Not much I need to say the product itself speaks for itself since I’ve switched to Amsoil I’ve seen a change in the way my engine runs and very impressed how the oil holds outBottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Great oilBy SCOTT, a Verified Buyer from Arkansas on May 04, 2026I’ve been an AMSOIL dealer for years, great products, great service and fast shipping, can’t get much better then that.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Why did I wait so long???By JEREMY, a Verified Buyer on May 04, 2026I have owned diesel trucks since 2006. Made my first AMSOIL purchase and am now wondering why it took me so long to switch. Excellent product. Super fast shipping. Great price. Oil and filter “kits” ready for my specific make/model. Yes please and thank you!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Max duty L5PBy Eddie, a Verified Buyer from Oklahoma on May 03, 2026Great oil and product at a good price. I don’t get the dreaded L5P typewriter tick and I don’t have to add an oil stabilizer any time of the year. Really happy with the product and definitely recommend it to everyone!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
Best OilBy PORTER, a Verified Buyer from New Mexico on May 02, 2026AMSOIL is hands down the best oil I’ve ever used. From the quality of the oil, the service company provides, to the random gifts you get sometimes. I constantly recommend AMSOIL!Bottom LineYes, I would recommend this to a friend.Was this review helpful?
-
star rating
