Your order may take longer than normal to arrive, and some products may be unavailable. We are working hard to overcome supply-chain issues and freight-carrier delays. Learn more.
Signature Series Max-Duty Synthetic Diesel Oil 5W-40
DEOQT (DEOQT-CA)
Quart Bottle
Case of 12
Signature Series Max-Duty Synthetic Diesel Oil 5W-40
DEO1G (DEO1G-EA)
Gallon Jug
Each
Signature Series Max-Duty Synthetic Diesel Oil 5W-40
DEO1G (DEO1G-CA)
Gallon Jug
Case of 4
Signature Series Max-Duty Synthetic Diesel Oil 5W-40
DEOTP (DEOTP-EA)
2.5 Gallon Jug
Each
Signature Series Max-Duty Synthetic Diesel Oil 5W-40
DEOTP (DEOTP-CA)
2.5 Gallon Jug
Case of 2
Signature Series Max-Duty Synthetic Diesel Oil 5W-40
DEO55 (DEO55-EA)
55 Gallon Drum
Each
Signature Series Max-Duty Synthetic Diesel Oil 5W-40
DEO27 (DEO27-EA)
275 Gallon Tote
Each
Signature Series Max-Duty Synthetic Diesel Oil 5W-40
Signature Series Max-Duty Synthetic Diesel Oil 5W-40
4.9 star rating
Based on 866 reviews
5 star rating
Best oil
By
ANTHONY,
a
Verified Buyer
from
Phoenix, AZ
on
January 31, 2022
It's the best oil I've ever used, probably the best oil in the world!!!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Excellent oil
By
MITCHELL,
a
Verified Buyer
from
Texas
on
January 29, 2022
Only oil I will run in my 2019 Cummins!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
DME 15W-40
By
DUANE L.,
a
Verified Buyer
from
Covington PA
on
January 29, 2022
Amsoil is one of the best oils on the market, after all AJ did make the first API synthetic oil.
Instant oil pressure even when it's cold than 32 ferhenhiet.
Was this review helpful?
5 star rating
GREAT SERVICE/SHIPPING
By
DAN,
a
Verified Buyer
from
NORTHERN IL
on
January 28, 2022
1ST TIME USING PRODUCT SO FAR SO GOOD GREAT TO DEAL WITH
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Excellent product!
By
DANNY,
a
Verified Buyer
from
Illinois
on
January 26, 2022
I immediately noticed a difference in the cold start being much easier and quieter. Will be using this oil from now on!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Excellent product
By
RICHARD,
a
Verified Buyer
from
NH
on
January 26, 2022
Long lasting and good protection for your engine
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Awesome product!
By
DAVID,
a
Verified Buyer
on
January 25, 2022
We absolutely love Amsoil products! Amsoil protects all of our equipment. Diesel powered Ram, turbo cars and of course 4T in our Briggs powered Kart.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Truck
By
ED,
a
Verified Buyer
from
Apopka
on
January 24, 2022
Wow better mileage, cleaner motor and cooler by 10 degrees the using factory oil .
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Best oil
By
DANE,
a
Verified Buyer
on
January 22, 2022
Amsoil is the only oil I will use for my vehicles.. it’s the best there is!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Quality product
By
JEFF,
a
Verified Buyer
on
January 22, 2022
Excellent product.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Signature Series Max Duty Diesel Oil 15w-40
By
BILL,
a
Verified Buyer
from
Canada
on
January 18, 2022
I have a 5.9 cummins ram with a fully built compound turbo set-up and Goerend transmission. The truck makes 800+ HP at the wheels and I drive it quite hard. I have only used and will only use Amsoil products for this build.
I am 63 and and have seen and used different products over the decades. It is so nice to now just look at the Amsoil website and order what I need for whatever I am working on.
I have always told my sons "oil is cheap, engines are expensive"
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
15W-40 oil
By
LEONARD,
a
Verified Buyer
on
January 17, 2022
This oil works great and protects my engine. It was easy to order and arrived quickly. Thanks
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Amazing oil
By
HUSSAIN,
a
Verified Buyer
from
Burleson tx
on
January 16, 2022
I ordered this oil because i saw very good amazing reviews and honestly its one of the best oils I've used in my truck gives great protection and great milage
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Happy long time customer
By
BRUCE,
a
Verified Buyer
on
January 15, 2022
I've been very happy with the customer service with Amsoil for a long time. Easy ordering, very fast shipping. I use their products in all my vehicles. I also use their products in my offshore boat.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Great 👍
By
Goose,
a
Verified Buyer
from
British Columbia
on
January 15, 2022
I started using amsoil 3 years ago after lots of research and found it to be the best. I use it for everything on my pickup.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
4 star rating
Greatr
By
DON,
a
Verified Buyer
from
Iowa
on
January 14, 2022
I've run Amsoil in my 6.6 Duramax in screaming hot and sub zero temps with no issues at all. I intend to continue to use it.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Good oil
By
JARED,
a
Verified Buyer
on
January 13, 2022
Its a good oil but i was surprised i didnt get any stickers. When i bought it previously i got stickers
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Very fast shipping
By
Chad,
a
Verified Buyer
from
Utah
on
January 12, 2022
Awesome shipping time!!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Great Product
By
BRETT,
a
Verified Buyer
from
Cocoa,FL.
on
January 10, 2022
I have used AMSOIL in my Ford diesel for 15 plus years and still going strong at over 444k miles!
Was this review helpful?
5 star rating
Best thing on the shelf
By
JEFF,
a
Verified Buyer
from
Unfortunately California
on
January 09, 2022
This is the only thing I have put in my truck seance I have owned my it.
Thank you for visiting www.amsoil.com. Certain parts of this website may not function with Internet Explorer. To continue shopping with us, please update your browser using one of the options below.
Look Up A Vehicle
