Customer Ratings & Reviews

I believe this oil has kept my engine from have bearing issues as is it the case in many 3 liter ram truck and jeeps that they put them in. Winter can be a issue with cold starts on diesel engine but with the Amsoil its never an issue here rarely plug in the block heater. Tony Harrington

Good product unfortunately however recent price increase will force me to change brands.

Noticed a difference in the sound of the engine after putting in Amsoil. Runs a lot smoother. Also, shipping was extremely fast!

Amazing engine oil , only oil I will ever used.

The best oil I ever had, extremely low oil consumption on ISX15 engine, runs 50.000miles till drain!

Best products out there highly recommended

Second oil change using amsoil. Old oil looked good after 24k miles. No issues.

I have been using this oil for many years in my diesel pickups. Unequaled protection allows for extended oil change intervals.

Order was processed and shipped very quickly. Have actually noticed my trucks fuel mileage improving and engine running smoother. I gave this a try after running shell rotella t6 for years and won't be looking back. Highly recommend!

Probably the best fully synthetic oil I ever used and purchased. I would continue to purchase. Go Amsoil

Been using since my truck was new. Currently has 94K miles.

Oil last and stands up to the label

I used this oil for two and a half years and 25000 miles in the 6.7 liter Cummins engine in my Winnebago RV. This included a trip through Canada and all of Alaska and back. I changed the oil and sent a sample of it in for analysis. The results came back that the oil was still in perfect condition, and could have been run longer. Now that I have those baseline test results, I will sample it after 20,000 miles of use, and again after every 10000 additional miles. This will allow me to see how long I can run it before it really does need to be changed. So impressive!

I only use Amsoil in all my stuff. I have had motors so hot from loss of coolant that exhaust is red hot. With no damage to motor where another lubricated with standard oil would have cam and rod bearing failure. These oils continue to lubricate. They have saved me many times.

Have used Amsoil for all of my diesal oil needs, oil filter and fuel filter. Have always had great performance from Amsoil, more expensive than most but you get what you pay for. My brother-in-law is a diesal mechanic and states beyond any shadow of a doubt it's the best on the market. Will continue to be an Amsoil customer.

Great product, easy to order and quick delivery. Would recommend it to anyone with a deisel.

Very satisfied , been using for over 15 years on 1999 Ford F-350 7.3 diesel

I am a subscriber to Greg Alberalla’s YouTube channel. He speaks very highly of Amsoil products and always seems to do his research before using a product. I did some research on Amsoil and it’s a no brainer. I will only be using Amsoil products from here forward. I wish you guys made a substitute to bw 44-44 for my 4th gen Ram 2500 transfer case. Keep up the good work

I have a 6.0 with 260K and I’ve been using this since I got it at 130K and this oil makes a difference. Engine is quieter EOT is lower and when I drain it the oil is still good. I started using noting but Amsoil since 2003 when I did a dump compilation with my Harley and one second day of competition I switched and the bike made more HP and TQ and ran cooler. If you’ve ever seen a three ball friction test it will show you this stuff works. Worth every penny. Pay me now or pay me later. It is cheap insurance!

Great products! Run nothing but amsoil in my 03 Dodge , love there oil’s packages fast shipping won’t use nothing else!!