Customer Ratings & Reviews

This oil was the only one I could find that met and exceeded the requirements for my turbo direct injection KIAs, These motors have a nasty habit of grenading after years of unheard detonation to the point of all of them being given lifetime motor warranties by the dealer. The extra warranty given by Amsoil is a nice bonus. I follow the factory change intervals regardless of the oils suggestion as $60 plus a filter a year is cheap insurance.

Had to listen close to hear the motor running. It's amazing what they can do with motor oil. More HP I can feel it.

Best lubricants in the market. Reduced engine wear especially on start up

Hands down the best oil on the market!

I use Signature Series in my 2017 GT350. I track my Shelby so its run hard, often. Amsoil Signature Series has protected my engine, I have no oil related issues what so ever. I highly recommend Signature Series for your high performance engine applications.

I have been using amsoil for 2 years now and since the lifter noise no longer exsists.

I have a LEXUS ES 350 and change every 4000 miles and this oil never fails! My 2006 Subaru STI use to burn through every oil but not AMSOIL!

Amsoil has priced themselves out of my business Oil is great but at what point is to much

Great product and great service

After extensive research I found that the best oil for my 68 vette is signature series 5W30, after all the hours of work it took to get every part of this project just right why would I settle for motor oil that is just ok.

I have researched this and my findings all seem to point to Amsoil as being the best of the best. I use the signature series 0W20 in my Toyota and it’s top of the line.

Probably the best 5w30 out there. Holds up really well.

I have used this oil in my Honda lawn mower, Craftsman leaf vacuum, and my Generic generator for years without a problem. The lawn mower is over 20 years old. Still runs strong and never burns any oil.

I feel like my engine noise has been quieter the last 1000 miles. Definitely less vibrations. However, when I opened the package one of the bottles was broken. So I had to run to a store and grab another one. I always stick with and oil. Everything was perfect except I was half a quart short since I had a bottle break. Hasn’t happened prior so maybe it was a one time thing

Excellent oil, Glad I made the switch from Mobil 1 ten years ago.

I've been using this for many years now. Always worth putting the best in all my cars plus I service several of my adult children's care and one grandson.

Products and delivery were excellent , promotional items were not delivered. Customer for 10 years.

When I switched to Amsoil nearly a decade ago, I did it because trying to navigate the different lubricants available was getting crazy. Everything I own has Amsoil in it, my Bonneville bike was my test bed. So, when I purchased a Coyote engine F150 I came home and dumped whatever was in it and did a change using Amsoil. My oil is always my first and most consistent thing about my vehicles. Not having to concern myself about lubrication takes a load off my mind.

The Amsoil Signature Series synthetic oil is amazing. I’ve been a Amsoil customer for over 20 years. I drove my 1999 Honda CRV for 23yrs. It had 270,000 when I retired it in 2022. I have a new CRV and will also use this oil. Excellent mileage. Excellent engine protection.

I've used this oil for years in both my Corvettes and my 911 Porsches. I'm confident it's the best synthetic oil available. Never had an engine issue using this oil in my high-dollar high-performance autos.