By
DAVID,
a
Verified Buyer
from
Midwest, Illinois
on
February 04, 2026
If you use Rotella 15w-40, your oil turns deep black in the first 500 miles. If you use AMSOIL 15w-40, I am still waiting for oil breakdown. So far, 1500 miles. The oil looks like the same oil as I put in at 424k mile oil change interval. Rotella probably isn’t what you have been told. If you want a PSD 7.3L to work the way it was designed, use better oil. Try AMSOIL. It is the best.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Great customer service
By
CHRISTOPHER,
a
Verified Buyer
from
Amite, Louisiana
on
February 04, 2026
Fast shipping and great customer service. All questions answered in a timely manner. Will continue to use this product for all my future oil needs .
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Great
By
DAVID,
a
Verified Buyer
from
Iowa
on
January 27, 2026
Just a great product, this diesel oil was a noticeable difference in running cleaner then OE motorcraft
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Because it works
By
TROY,
a
Verified Buyer
on
January 26, 2026
This is my go to oil for my 2015 F250 6.7 Powerstroke. I do this every 5,000 miles because I love my truck. I take care of it and it takes care of me!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Best lubricant on the market.
By
JEFF,
a
Verified Buyer
from
North Carolina
on
January 21, 2026
I’ve done a lot of research using independent lab research and reviews about AMSOIL. In my opinion and by the information I have found, I have come to the conclusions
that AMSOIL is the best money can buy.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
4 star rating
15w 40 over 10 galon
By
VICTOR,
a
Verified Buyer
from
FL
on
January 20, 2026
One of best oil you can try in your truck
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Amsoil is all I use.
By
DARIN,
a
Verified Buyer
from
North Carolina
on
January 19, 2026
I use Amsoil in all of my vehicles, equipment and side x side. I swear by it. It costs just a little more but it is a superior oil.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Great oil
By
JUSTIN,
a
Verified Buyer
from
Canada
on
January 18, 2026
Oil works great used it in my truck since new with no lifter issues or bearing issues factory uses 0-20w I run 5w-30 and no issues
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Really good oil same price as the t6 Rotella way better
By
SHAWN,
a
Verified Buyer
on
January 10, 2026
Same price as a t6 Rotella and way better quality oil
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Jeep diesel
By
DELBERT,
a
Verified Buyer
from
Kentucky
on
January 07, 2026
I am impressed with this oil i put this in my 2021 jeep gladiator diesel it runs good cold starts better it will be the only oil I use from now on.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Awesome oil
By
LARRY,
a
Verified Buyer
on
December 29, 2025
Great quality oil, truck seems to be running much better. Will do an oil analysis soon through blackstone.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
The BEST
By
WALTER,
a
Verified Buyer
on
December 24, 2025
It keeps my truck going strong. 220,000 miles and looking for that again.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
HD work
By
CHARLES,
a
Verified Buyer
from
Northern Ontario
on
December 15, 2025
Had a snow contract in this area.
Worked the 6.4 diesel hard and non stop switching drivers. 24 hr work
The engine smooth and as quiet as a diesel can be.
No consumption in 2 weeks. Many hard km. Great product
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Protection
By
FRED,
a
Verified Buyer
from
Ontario
on
December 03, 2025
Bought this for the power stroke 6.0. Winters get cold and find easier start with this product.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Oil
By
JOHN,
a
Verified Buyer
from
Texas
on
December 02, 2025
Awesome oil been using oil for 20 years in snowmobiles to trucks!!! Best oil ever
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Honda snowblower and mower
By
ALBERT,
a
Verified Buyer
from
New brunswick
on
December 01, 2025
Run this stuff in all my small engines. May be an overkill but they work the very best.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Great oil
By
STEVEN,
a
Verified Buyer
from
Salem, OR
on
November 30, 2025
I love this oil paired with Wix filter gives me confidence my engine is in good hands.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Good stuff
By
BOGDAN,
a
Verified Buyer
on
November 29, 2025
I’m using the oil in my semi truck 10w-30 ful synthetic, it’s a good stuff
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
The best oil on the market hands down
By
EMMETT,
a
Verified Buyer
on
November 28, 2025
Since using AMSOIL for my diesel has better gas mileage. That tells me everything I need to know about this oil compared to the part store brand. AMSOIL is the only oil I’m using in my diesel from now on
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
My X595
By
burned300,
a
Verified Buyer
from
Columbus Ohio
on
November 24, 2025
Been using this oil since I bought my JD back in 2016. All is well
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