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 1,538 reviews
5 star rating
I like the Synthetic Oils from Amsoil the best
By 
Randy , 
a 
Verified Buyer 
from 
Williston , Vermont 
on 
October 15, 2020
The Amsoil Synthetics are so much better ,I get outstanding results using there Synthetic Oils . The 5W-40 Synthetic Oil for the Diesel engine is the best to use all winter, the engine starts easier in winter months and runs cooler engine Temps even in the summer hot days . There Synthetics provide easier starting in the cold days of winter as well as keeping all engine parts running easier ( Less Friction ) on those cold days and less friction and less heat build on the warmer or hotter days of summer . You can see lower engine temps in the summer when running , less friction on those metal parts means better mileage and less wear . I like all there Amsoil synthetic oils and greases. If you're not using the Amsoil Synthetics your wasting your money on the other oils you should be using there Synthetic Oils at Amsoil and seeing the difference it makes on your equipment by running better their Synthetic Oils are much slipper on all metal moving parts .
By 
Baldeagle535, 
a 
Verified Buyer 
from 
New Mexico 
on 
September 20, 2020
This product performs as advertised and tested. The engine starts easily in cold weather; it runs cool in hot weather. It protects the engine against excessive wear.
I am a happy customer after using it in two different diesel engines.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
By 
Anonymous, 
a 
Verified Buyer 
on 
September 17, 2020
I love this oil. Have been using it for a long time. I have a 2005 Dodge 3500. My mileage went up to 23+ miles per gallon. Up 3 MPG. I don't drive as much since retired, so I change oil once a year. This is excellent oil for any diesel.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
By 
Anonymous, 
a 
Verified Buyer 
on 
September 16, 2020
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
By 
Anonymous, 
a 
Verified Buyer 
on 
September 16, 2020
Great product and great company to deal with. I enrolled in the preferred customer program and it is great. Fantastic catalog and orders were shipped immediately.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Awesome oil
By 
5.9 Cummins, 
a 
Verified Buyer 
from 
Western Oklahoma 
on 
September 16, 2020
I switched to this oil in my 2006 dodge Cummins. 1st start up with the Amsoil my engine sound quieter and felt smoother. Best oil I’ve used.
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