Customer Ratings & Reviews

I run this in all our vehicles including my daughters. The girls typically travel less than 20,000 miles per year so I change their oil once per year. In my turbo charged vehicles, I change at less than 10,000 miles. I typically see a 10% fuel consumption savings which, I feel, is a testament to the reduced friction.

Great product for my Camaro 1LE. Oil of choice for my LT1 engine, better than Mobil1

Buddy of mine owns a Ford F150 had to replace the engine so he wanted to give Amsoil a try after I had given him my thoughts on how good Amsoil is. The new engine is still in the "breaking in stage" update will come later.

If I could not get this oil, I would be forced to use Mobile One.

U.S.A. made, 100% synthetic not blended, increase fuel mileage, heat displacement, leaving film so you don't have to worry about cold start with no friction, I would recommend this product for every type of motor. They manufactured for everything and every brand.

Been using mobile one for many years with no problems. Known about AMSOIL my whole life and was always wanting to go to AMSOIL. The membership and free and fast shipping made it an easy decision All of my personal vehicles are going to AMSOIL now. Wished I went this route sooner. Best quality oil on the market. Great company. Highly recommend AMSOIL.

Since 3 years now i used signature series oil in my truck.

Well pleased with the product. The testing and results seem to prove that protection for the long term is guaranteed. The Q & A regarding the oils are quite informative and have caused me to rethink many of the (incorrect) assumptions I have made over the years. Currently, I'm driving a Durango SRT and am well pleased with the smoothness and performance of the hemi since changing to the Signature series oil recommended. It's always good to research potential issues with an engine/power train and see how a specific action will help to mitigate a given problem. In the case of the Dodge hemi, premature cam and lifter wear seems to be an issue with engines left to idle for extended periods and/or run for extended oil change intervals. The Amsoil Signature series oil is well suited to mitigate the problem. Time will tell, but currently 70,000+ miles have not changed the 'as new' performance or noise levels in a great engine.

I have been using Amsoil signature series in my 2014 Jeep Wrangler Unlimited since 2015. It has had no engine problems to date and is approaching 200,000 miles. Many trips pulling a 7' x 12' enclosed trailer. I am very pleased with its performance.

Love the customer service and speedy shipping

Amsoil user for 20+ years. No engine problems ever with 25,000 mile or 1 year oil change intervals.

When I was a kid, I would help my dad change the oil in his work truck and he used AMSOIL and taught me at a young age that changing your motor every 3000 miles will make your vehicle last. Now it is easier because oil last to 10000 miles. Thank you AMSOIL!

Consistency, is the key. Always quality lubricants for extreme heat and cold weather. From south Texas to northern Wisconsin: there is nothing better

Use Amsoil signature series in our vehicles for years.

I like the choice of products and I notice this oil made the engine run smoother

I swear by this product for years, it is the best don’t use nothing else because it’s definitely what the company say it is. I told my mechanic, he knew about it but they don’t sell in the stores. After rebuilding my motor using the products he became a dealer.

Been using this in my RAM 2500 6.4l for a while now. The Ram seems to love it compared to the Pennzoil they recommend

Best oil for your car or truck. It keeps the engine clean and it looks like new inside very good product

Never been disappointed by this product and I use it for almost 10 years now BEST Oil

Good oil but taste like crap