Customer Ratings & Reviews

I’ve been running AMSOIL Signature Series for about 15 years now in everything I own — Ford Ranger, Chevy 3500 van, Chevy 2500 van, BMW X3 and my 2025 Ford Maverick EcoBoost. This oil flat-out works. Engines stay clean, oil tests come back great, and it holds up way longer than anything I ever bought at the parts store. I change it every 8500–11,000 miles with their filter and never worry. Cold starts in winter? No problem. Long summer highway runs at 80–90 mph? Still smooth. Even my turbo truck barely uses any oil between changes. If you want your engine to last, quit messing around and use AMSOIL. It’s not cheap, but neither is an engine rebuild.

Best oil I've used definitely can feel my engine run smoother, I'll be using this oil for all future oil changes

In the past I was a long time user of Mobil 1 and after reading many articles about the high quality of Amsoil I decided to try it. I will never use any other motor oil!

Great oil it is what it suppose to do keeps the engine running smooth and clean for a long time..

I grew up on amsoil. My father grew up on amsoil. His father grew up on amsoil. I have been happy with everything I’ve gotten for my C6 corvette. Shipping time is unparalleled. Worth every penny if you love giving your car the best there is.

Delivered fast. Packaged neat. Used the funnel it came with. Now I have the peace of mind knowing I’m running the best that’s available for my truck.

I have several vehicles and always use amsoil. I have a car with 300000 miles. Amsoil since new, can’t even hear the engine run it’s so quiet! That says it all!!

I wouldn't use anything else!

Simply the best.

Best oil on the market

I have been using this oil in my Jeep Grand Cherokee since it was new, 97,000 mi later still runs great.

I only use AMSOIL products in all my vehicles. All I can say is if I put 6 qts in 5000 miles later I get 6 qts out. No other oil I have used does that

Took a little extra time to get the gallon jug, but I guess that means they sell enough that it's hard to keep on the shelves

I just recently switch to amsoil for all of my fluids and I absolutely love them and I can tell my truck does too!!!!

From all my research AMSOIL is the best period when it comes to oil. I will use it from now until I die for all my vehicles.

Best oil on the market change it every year on my 2014 Silverado Crew Cab LTZ 28,890 original miles

Same as before

I use this light oil in my Tundra 4.6L engine, and it seems to work well. Being 100% synthetic oil, really boosts my confidence in using this in my Tundra.

I have used this oil since 1998, and have been using the bypass filter system as well, with great success! My cars always rust out before the engine wears out. Two of my cars have had just under 600,000 kilometers and the engines run like new. They always start great, run great. Too bad the body rust destroys the cars. Winter sure is hard on cars.

I’m using AMSOIL for two years now and I’m happy with the oil quality and filters. Unfortunately many times they’re out of stock on filters but we try to work it out. Other than that is a great brand