Customer Ratings & Reviews

Excellent product as always. Can't say there's much improvement in fuel mileage as the viscosity of modern oil is basically thick water, but I have noticed a 1-2 psi increase in oil pressure over previous dealer installed oil. Truck seems to run "happier". Will give a better update on lifespan and any other positives at next service.

Been with amsoil for 30+ years. Truly the best. Any of their products are fabulous and exceed expectations !!

I have been using amsoil for 5 decades and rely on it to keep my vehicles running for a very long time. My oldest vehicle is 39 years old with 400,000 km's on it and it runs like a charm even though I still push the original engine hard there is no sign of oil loss or burn, I trust Amsoil.

If you are keeping your vehicle for the maximum usable time this is the best way to insure it stays in the best possible mechanical condition and that comes from 35 years of usage

I'm always impressed as I drain the old out during an oil change, after 7 - 8K miles, at how clean it still looks. Very durable oil.

I’ve been using Amzoil products for a number of years now. I am convinced that they are superior quality and will give my vehicle engine maximum lifespan. In light of the costs of vehicle engine maintenance and replacement. I consider using a Amzoil a wise investment. I especially want to commend the Amzoil dealer for their speedy delivery. I ordered online, and I literally the next day or two I received my order on my doorstep from out of state, so that to me is pretty impressive. Thank you!

I have not yet used it but I will find a purpose for it. I ordered this by mistake , wanted the 5W20 oil. I have been a preferred customer for 15 years and and using Amsoil for 20 years. Was disappointed when they could not help out with return shipping charges.

great oil. i use it in my 2001 ford truck.

Use this in my 19 Toyota Tacoma. Runs quiet and smooth. Feel good knowing the protection of AMSOil.

This oil is fantastic. My 2.5 Turbo runs smoother and quieter and the protection is second to none. After 8,000 miles this oil is just like new in the crankcase. Yet I'm not surprised... my prior auto ran 425,000 miles without a single engine repair! I will always recommend Signature Series Amsoil..

Started out using amsoil in my 2015 chevy 2500HD Diesel...it alwas drained as clean as when i put it in....101,000miles so far and mileage is still 29mpg Highway.....Just took delivery of a 2023 ACADIA SLT 3.6L in May 2023...at 1600 miles i drained the oil that the dealer put it....it was BLACK....who knows wht oil these dealers put in your new vehicle....at 2000 miles now the oil is as clean as i just poured it in.....am getting 30.5 MPG HIGHWAY...!!!!

This motor oil doesn't burn like the previous motor oil that I used (Mobil 1). It lasts the entire duration between oil changes without having to add additional oil. My car has 278,000 miles and I want it to last many more miles.

Been using this oil since 1995. Did some modifications on my 1998 Camaro and there was no noticeable wear. All the parts looked brand new. I use this in my hot rod and both of my other cars. Simply the BEST

My truck loves this. Runs smoothly and greatly reduced maintenance costs. Have over 8k on this oil and still looks good.

This is the best oil I’ve ever used,there will be no other oil that is going in my Heritage Softail!

This oil seems to be an elixir for my 115k mile F150 workhorse... she's running smoother than ever (I've run Mobil1 syn since new, until now). Highly recommend for your car or truck too!

very pleased with this oil ffelt the difference on my 2019 ram runs cooler and can feel the engine is quiter now after using this product

Amazing product, the advanced quality can be seen in the YouTube videos that compare Amsoil to other top oils, Amsoil way better after freezing, and heating. Now I want to buy transmission fluid for my cars and oil for 2nd car, and am frustrated I will not get the preferred customer discount for my first purchase.

This is my first time using the oil and filter but I will come back with a answer but one thing I noticed is that it is really quite

Good 👍