Customer Ratings & Reviews

The engine flush is amazing! I just picked up another gen 1 cummins that has had cheap oil it's whole life....flushed with Amsoil engine flush and wha came out was amazing.....dirty sticky Nast oil clobs....then added the Amsoil 5w30 and installed the oil bypass filter as well and my oil is as clean as it looked when I dumped it in two weeks ago......great products......well pleased.....pricey but very worth it.

Having used amsoil for many years I am sold on the product.however a recent occurrence deserves mention. A 2004 Toyota Tundra belonging to my girlfriend has for the last 12 years Had a mild knock at every cold startup that subsides as the engine warms up. I persuaded Her to let me put Amsoil in on the last service. The knock was there at initial startup but I noted Did not take near as long to quite. It has not made the sound since. 3000 + miles.

Have been using Amsoil for 20 years. It only gets better.

Only use Amsoil in all my engines

I use Amsoil in my farm equipment and vehicles. Use nothing else.

OK, fewer oil changes, better gas milage, longer lasting engine, easier winter start ups, less foreign oil. Need I say more?

I have a 2000 Honda CR-V with 240,000 miles on it. The first 40K was conventional oil, then I switched to Amsoil full synthetic. At 240K, it does not use any oil between its annual oil change.

I have been using Amsoil products for several years. It is something that you cannot see working but the high milage I have attained on several vehicles while using your product is proof to me that it is good. A few mechanics that I trust have advised me over the years as to what a great product Amsoil is and based on their recommendation and my own knowledge I wouldn't use anything else in my vehicles. Keep up the good work your founding Father started and continued testing / improvement and ease of ordering is always appreciated.

In the eighties my father started using Amsoil in our family vehicles. He explained the benefits of using Amsoil. Over the years I tried other brands. I came back to Amsoil! Living in Phoenix with extreme heat, I need the best oil for my vehicles. I only run Amsoil in our three vehicles, and my air cooled Harley. Amsoil stands up to what Mother Nature throws at us. Thanks for a great product!

This oil is by far the best on the market. I have recommended it to all my family and friends.

Very good oil

Been exclusively using AMSOIL products in my vehicles since 2005. All three of my gas vehicles continue to run smooth and burn little or no oil.

Best oil available anywhere. I am sure it is the reason my 2005 Chevy Avalanche is still going strong with well over 200,000 miles on it!!

I have been using Amsoil in everything I own.They have all types of oil related products that are great!!

You can trust that it's 100 % Synthetic and it also increased my mpg about 5% in my 2012 f250 6.7 Diesel Been using it ever since 3000 miles and now I have 68,000 miles very happy with the product

Love it

Started using over fifteen years ago. First in my motorhome. Was told it could increase my MPG. It did by 2 miles to the gallon. In a motor home that's a lot. I have been using it ever since in anything that burns fuel. Love all their products.

I use no other oil in my truck. The simple fact that this oil not only performs to a high standard in the heat, it also out performs other oils in Canadian winters. Therefore, I use nothing else in my truck and I also use Amsoil in my 2015 Indian Chieftain.

I used the signature 5w30 in all my cars and trucks. Never a problem. Again...BEST OIL PERIOD!

I use this oil in my 2017 GMC Sierra. It exceeds the Dexos 1 requirement, that GM has dreamed up. Don't believe their hype this oil will work great in your rig.