This is the 3rd diesel truck I have owned over the past 20 years. I started using this oil after being re-introduced to the newer and better way to access getting Amsoil products. I have been a long time fan of Amsoil, as I was in the racing community in the 60's -2000's running USAC several divisions and the NASCAR Modified and Super Modified divisions. I had Amsoil as a sponsor for many years of that time period. I stopped using Amsoil after racing due that it was so difficult in finding someone who sold it and would not want to sell you large quantities, if you wanted to buy if for a normal consumer need.
Once I found that I a general consumer was able to purchase it from your website and become a discount customer I was all in. I did this in 2015 and have converted all my vehicles to amsoil products. This Diesel oil is great as it has reduced running temp of my motor and turbo, the coolant has increased the cooling quality and has the additive that i no longer have to buy what Ford wants to regen the coolant due to a mental degrading in the engine and cooling system. I also use the Amsoil micro oil filter for each oil change. The truck has just turned over 170K and is still running great. I change the oil every 20K with filter. The truck is a 2012 Ford F350 Super Duty 6.4 Powerstroke Diesel.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
F350 Super Duty
By 
ROBERT, 
a 
Verified Buyer 
from 
St. Augustine, FL. 
on 
October 24, 2024
I have been using this in my truck since 2018. I like the quality of this over the Motorcraft. And it is actually less than a dollar more per quart the the Motorcraft full Synthetic.
My current truck (2006 lbz duramax) has had Amsoil since its first oil change. Oil has been changed every 25k miles and filter every 10k. At 247,000 miles truck is running strong with zero blow by and burns no oil between changes. My opinion Amsoil makes a great product!
I have been using Amsoil 15-40 diesel oil in my 2007 Chevy Duramax since I purchased new in 2007. Never any issues, no oil consumption and easy cold weather start-up.
Great product i use amsoil in everything this specific oil i use in my M35A2 Kaiser jeep deuce and half 6×6 keeps engine clean less wear runs smoother great product
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Oil
By 
JOHN, 
a 
Verified Buyer 
on 
October 12, 2024
I have been driving my Cummings powered Dodge since 2013 and protect my engine with the best synthetic oil I can. AMSOIL is my choice.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Diesel oil
By 
DAVID, 
a 
Verified Buyer 
from 
Saluda, South Carolina  
on 
June 27, 2024
I use this oil in my 86 Chevrolet G30 Highcube van with a 6.2 non-turbo engine and the oil pressure increased about 5 psi and oil consumption on long trips decreased. Also the oil drips have decreased, cutting down on floor clean up.
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