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Since I started using Diesel All-in-One, my trucks and tractors start easier, smoke less under load and my fuel mileage/ horsepower has increased also.
I've been using AMSOIL in my GMC Duramax for 15 years now and still have the original injectors. No problems with the engine and great mileage compared to most that I know. If you want to increase the reliability and longevity of your diesel truck or car, use this awesome product, seriously.
I've been using All In One in my diesel powered 2020 GMC Sierra pickup. When I started using it I gained about 4 MPG in fuel efficiency. The driving conditions before and after were the same, so I have to credit the improvement to All In One. Also, last winter I spent some time in the north woods with temps hovering about -25F. No jelling. The truck ran fine all winter. I don't know if I would have had problems without All In One, but I wasn't about to take the chance. I recommend to anyone running a diesel powered truck to routinely use All In One.
Use in my 2001 F350 7.3L Turbo dually crew cab. Had problem with injectors missing because of ULS fuel. Tried other products but this works better and faster than all the others. Made me a believer in Amsoil products.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Quieter injecters
By 
JACK, 
a 
Verified Buyer 
from 
Yuba City Ca. 
on 
May 21, 2021
By 
SHANE, 
a 
Verified Buyer 
on 
April 24, 2021
Noticed a difference when put in tank
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5 star rating
This stuff really works
By 
WILLIAM, 
a 
Verified Buyer 
on 
April 16, 2021
I had tried several fuel treatments to clear up some low rail pressure issues in my duramax.. I use amsoil everything...I didn't know this stuff existed..I used it and it worked in the first tank..I always keep on hand now and never fill up without it
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
2021 Chevy Silverado 2500
By 
NEIL, 
a 
Verified Buyer 
from 
North Florida 
on 
April 11, 2021
Just bought this new vehicle and manual suggested if you didn’t have access to trufuel you should use a product like this one. I researched the options and determined that Amsiol was the leader. Proof will be determined in the future. So far so good.
Good product, didn't have any problems with my Diesel fuel gelling when we went into the single digits. I would definitely recommend. Don't like the shipping/handling prices though as they were more than the product itself..
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