AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil
DZFQT (DZFQT-CA)
Quart Bottle
Case of 12
AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil
DZF1G (DZF1G-EA)
Gallon Jug
Each
AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil
DZF1G (DZF1G-CA)
Gallon Jug
Case of 4
AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil
DZF55 (DZF55-EA)
55 Gallon Drum
Each
AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil
AMSOIL Signature Series 0W-40 100% Synthetic Max-Duty Diesel Oil
4.9 star rating
Based on 1,550 reviews
5 star rating
Amazing motor oil
By 
GREG, 
a 
Verified Buyer 
on 
October 19, 2023
Been running this in my 2004.5 ram 2500 Cummins for several years now. Tried other oils and it runs hot with AMSOIL in runs 20 to 30 degrees cooler. Great product
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Best Oil Ever
By 
RALPH, 
a 
Verified Buyer 
from 
Stanley, North Carolina  
on 
October 17, 2023
Amsoil is the only oil I put in all my Diesel engines. I love the next day delivery I will be a lifelong customer
I use Amsoil in my cars and motorcycles and just tried in my semi truck. Can’t believe the difference over other major brands. I was disappointed major brands because I do long oil intervals changed with my ops filter and oil test every 25000 miles. The major brands I couldn’t keep the base up to where it needed to be. I will update on my lab test on Amsoil after 25k . Plus my fuel mileage went up one tenth. We will see if this continues
By 
MIKE, 
a 
Verified Buyer 
on 
August 30, 2023
Surprised, a lot smother and quitter engine
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Using this oil for many years
By 
MAHRAD, 
a 
Verified Buyer 
from 
Central Florida 
on 
August 27, 2023
I have been using the 15 W 40 Amsoil diesel oil for many years on different GMC Duramax diesels. All on lower mileage trucks. It is a good durable oil. No burning of loss of oil. No engine mechanical issues. I perform the oil changes myself. Libricity of the old oil is very good. The 2.5 gallon container is difficult to handle without spilling. I recommend getting it in quart size containers. I recommend the oil.
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