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I have always used Royal Purple 15-40 in my diesel engines but decided to try Amsoil 10W-30 after watching a head to head comparison online. After the oil change to Amsoil and Amsoil filter my F-350 Superduty seemed to quiet down a bit. This might sound crazy but she seemed to say thank you by running smoother and quieter. I highly recommend Amsoil oil and filter.
I use this oil in 6.7 and 6.0 Ford engines. As well in John Deere tractors. Oil works flawlessly. Will continue to use
Bottom Line
Yes, I would recommend this to a friend.
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4 star rating
diesel oil that is perfect for cold weather
By 
Every day driver , 
a 
Verified Buyer 
from 
Wisconsin 
on 
June 01, 2021
this oil is perfect for those extreme cold days, used in truck that normally recommends 15 -40 . This oil helped with cold startups in weather that was at freezing or below. We had zero issues with startups even when it was -39 out..
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Amsoil
By 
MIKE, 
a 
Verified Buyer 
from 
Langley BC  
on 
May 26, 2021
My diesel truck had a plugged EGR code and was getting sluggish to the point my turbo would only spool up to 15psi at WOT. I cleared the code with a scanner and decided to switch to Amsoil. After 4,000 K my EGR seems to be clear, my turbo spools to 22psi now at WOT and the engine feels better. The last time I used Amsoil was back in the 90's, no lie. The quality is still the same if not better! I'll be sticking with Amsoil from now on.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
My diesel truck loves this
By 
JAMES, 
a 
Verified Buyer 
from 
Van Wert Iowa 
on 
May 21, 2021
My 1990 f350 7.3 sure loves this amsoil 10 30w hd oil. Everything i own runs on amsoil and i get better results including mpg and quieter motors
I purchased my 40 horse LS tractor last year. After the 50 hour break-in, I changed the oil to Amsoil. The 3 cylinder diesel engine runs smoother on Amsoil and I won't need to use a heater in the winter because of the cold weather flow of Amsoil.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Good Oil for Kubota BX series
By 
Grizzy, 
a 
Verified Buyer 
on 
April 25, 2021
I've used Amsoil Diesel Oil in my 2010 Kubota BX 1860 since it was new. The tractor now has 1000+ hours and runs like new. It doesn't burn any oil.
7500-10k between changes and the truck idles at night; sometime doesn't shut off for days. I get the filter also. 6.0 powerstroke
Bottom Line
Yes, I would recommend this to a friend.
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