Customer Ratings & Reviews

I like the research I found the good stuff about it I like the fact that it's flow rate when it's super cold is above all the rest

Love the quality of the signature series oil.

If someone is out there looking for engine oil that is beyond premium look no further. My 2013 Civic SI 2.4L I4 engine has 181K miles still counting and it burns 0 drops of oil. I do 5K mile interval changes and no issues what so ever. I started using this oil for my 2009 Toyota Avalon 3.5L V6 as well, 250K miles and counting no oil consumption yet. For those who don't believe me I will start posting every oil change on youtube. Many are skeptical about my cars not burning oil but I always measure what comes back out and it matches what always goes in. So 5 quarts go in and 5K miles latter 5 quarts come back out.

The product is great. Love the products.

I’ve been using Amsoil for a number of years now. I don’t plan on changing.

Been using this product for 5+ years in my older Ram 2500. No complaints

When I bought my car from it's original owner, he told me he only ran amsoil in it since day one. The car has been tuned and (slightly) modified with some bolt ons and flex fuel, and compared to others in the community, it's held up great. There aren't any amsoil garages or retailers local to me, but I have the same love/passion for the car that the original owner had, so I've stuck with amsoil for every oil change since buying the car 3 years ago. My car loves amsoil, and I'll use it for all future applications/builds. Even if it's slightly more inconvenient for me to purchase locally.. (by no fault of amsoil) than it is to go with other brands :). I've never heard a bad word about this brand, at worst I've heard that "liqui molly is the next best thing". You guys have my loyalty ❤️ thank you :)

Used these products since my vehicles were purchased new. One is 20 years old, the other 26, both high mileage engines run great .

Or recommendation from a very reliable source, I went to the 550 synthetic in my Chevy Camaro 3.6 engine going to add a Tracy Lewis Catch scan soon to really extend the whole life and keep things clean

Our 2022 subaru outback turbo. Its been on ams oil sence the 500 miles. Today it has 85,000 miles Done oil changes every 7000 -8000 miles Doesn't use a drop of oil yet I strongly believe in this oil This our 2nd subaru from new. This time I done things right . Thank you ams oil

Amsoil Sig Series is the best - Always have glowing results from Blackstone Oil Testing.Robbie

My oil of choice over even Mobile1

The last rebuild of my 1986 Toyota 4Runner I switched to Amsoil 10W-30, and it's now over 407K miles and the 2200RE runs smooth and perfect. Burns very little oil, no smoke at all. I can't wait to see how long it holds up, I would never consider using anything but Amsoil.

Great product and excellent customer service. Highly recommend.

I was 10yrs old when I saw a neighbor with his work van wrapped in AMS Oil logo. That was 45yrs ago. Growing up I began to see AMS Oil in automotive shops and Drag racing events. I purchased my first round of AMS Oil and filter to run in my 2025 Ram 1500 3.0l SO. I look forward to running AMS Oil in all my vehicles and motorcycles. Better late than never!

Been using Amsoil for over 12 years and always arrived at my doorstep quickly. Blackstone lab has always gave great results for this oil no matter what car I run this in .

Always trusted Signature Series however had to bump up my viscosity based on an oil sample submitted recently.

Top notch product. Never had a negative experience with any Amsoil product. More then 1 vehicles, I switched to Amsoil auto transmission fluid have shown significant improvement (including smoother shifts and less/stopped slipping)

Amsoil is the best engine oil money can buy. Improves mileage and malkes engines last for well over 100,000 miles.

Easy to read side makings, nice top to poure products