Customer Ratings & Reviews

So, it was time to change the oil in my John Deere 2025r. Being a Amsoil PC I decided to try Amsoil in my tractor. I used Amsoil Engine Flush before pulling the plug and after draining my oil I'm glad I did! My oil was full of soot and carbon! After installing my Amsoil filter ( got the filter recommendation from Amsoil Tech.) I added some fresh Amsoil 5w-40 and started my JD up. I've never heard it run so quite! Almost sounded like a gas engine it was so quite! Looking forward to seeing if I can ' feel the protection' when I use it !! Thanks Amsoil!

I used this oil for years in my truck and my cars. Best oil by any circumstances

I have been using this oil the truck has over 200 thousand miles and going strong I change it once a year and I also a change the filter at 6 months intervals

Love this oil for my Duramax diesel. Just made a 3,000 mile trip and didn’t have to add any. Love the wide mouth of the quart container as it pours really fast

Have been using it fro years because of the superior engine protection. Absolutely the best oil money can buy. Yes, it's expensive compared to other oils. But the old saying "You get what you pay for. Go cheap, get cheap". Amsoil offers peace of mind knowing you are getting the best protection for your diesel truck.

Superior product.

I refuse to use any other oils in any of my vehicles. Truck bike boat tractor even lawnmower.

I run this in my 7.3 powerstroke for 10k miles and change the oil filter halfway. So far no issues after 130k

Use in my Freightliner with bypass and powerstroke with bypass. Analysis done every 15000 miles on both. Very low wear metals, soot and oxidation out to 60000 miles on Freightliner.

The best!

Very happy with the product. Have always heard great things about amsoil. And now I'm a believer.

I’ve used this oil in several different diesels I own and feel it definitely stands out from the rest in the synthetic oil market. The lubricity and thermal breakdown resistance is unparalleled by any of its competitors. I’ve noticed a reduction of value train noise and smoother and easier startups. Superior in quality, highly recommended.

Very good products and services.

Truck runs smooth. Couldn’t be happier.

I use my diesel 3/4 ton gmc pick-up to tow a 8000 lb. Travel trailer in northwest mountains. Never once did I worry about the extreme environment I was in

All Amsoil products blow away the competition. It is just a great product. I use the signature series in my diesel truck and change the oil at 15,000 miles. It just runs better. I have I have 254,000 miles on my Chevy 2500 HD diesel.

Best products on the market!

Great heavy duty oil have to order extra or remember to order in advance i dont have any off the shelf dealers local

Best oil that I’ve used on any of my vehicles!!!!