Customer Ratings & Reviews

I had 12,000 mile oil tested and the results were surprising as to how good the oil still was. I’ve used this oil for 4 years and my engine has never run better and uses no oil.

very good

This oil works. Improved performance and mpg.

AMSOIL is simply the best, period!

Feels like my trucks run smoother after switching from mobil1. 2010 Toyota Tacoma with 150,000 miles and 2006 Toyota Landcruiser with 190,000 miles.

I have finally gotten all my vehicles switched over to Amsoil products. I both the high mileage oil for a 2016 Hyundai Santa Fe 2.0T with approximately 117,000 miles. At some point in its past history of dealer maintenance, the dealer didn't notice an oil leak. I noticed a problem when the oil light came on, I added some oil to get my wife through the work week. I decided to do the oil change myself and found where the approximate leak was. I am not a mechanic, but the dealer is BLIND. My wife crawled under and without me saying a word she saw the oil leak. I decided to use what I thought was a high quality high mileage motor oil by a company starts with M and ends with 1 full synthetic. The oil did not slow down the leak, still was putting 1/2 quart in every two weeks. I know I have an oil leak, I don't want to get it fixed at the moment. On to the Amsoil oil review. Lots of research and science led me to Amsoil products. I bought the high mileage oil and did the oil change almost four weeks ago. This is the part I am amazed by, The Hyundai has only lost a little under 1/2 a quart of oil. I have no words to explain this, ,but this made me decide to only use Amsoil for my current vehicles and future vehicles. Thank you Amsoil!

The oil seems to be doing it's job. Engine sounds the same and runs the same, but I have noticed slightly better fuel mileage running this oil. Delivered promptly and intact.

Heard about Amsoil for years, but never used. About 5 years ago I tried it, and haven't looked back. Run in both cars, and my motorcycle.

Great product, the vehicle runs quiter and smoother.

I always get the product quickly and it has always been correct. I love the products and plan to use this for all my vehicles.

I have been using this oil for a few years now and I absolutely love it. It helps my car run better

I’ve been using this product for five years and it’s been wonderful

Changed oil on a Friday night. The next two days drove 1600 miles to pick up a gift from ebay. When I got home the oil was full and same color as new high milage oil I installed. Great trip, great oil. 252,000 plus miles on 2003 Silverado.

I had to settle for the high mileage instead of the signature blend which is my usual oil. But I've been running it now for about a month in my daily driver (Ram 1500) and I do anywhere from 50-100 miles a day. Steep grades, mountainous highway driving, high desert heat upwards of +100°. And this oil has performed better than any other "synthetic" oil you buy at one of the generic parts stores. I don't notice a big difference between the signature series and this one, but I like them both and so does my truck. Last oil change, my oil still looked like it had plenty of life left in it. Which is a good sign. And when I added the new oil (high mileage series) it made my engine run so smooth and quiet. Can't wait for my next oil change when I go back to the signature series! Amsoil for life!

I’ve used this oil for years and I have never been disappointed with it

engine knocks a little with this oil, i put in valvoline max life 10w30 before but never had any knocks!! ?

I run this in my o3 Dodge Ram with no problems.

So far the oil is running good inside the engine there’s no check engine lights or anything.

Best oil for my 2003 Silverado rolling up on 100,000 miles!

5 star