Customer Ratings & Reviews

I have used this motor oil in my 2014 Honda Crosstour V6 4wd three times for 12+ month extended oil changes. It has contributed to improved fuel mileage, about 2 mpg. Oil analysis indicates my engine is in better than average condition for a 120k+ mileage and could go for 14 months between motor oil changes. I recommend it to other Honda vehicle owners, understanding the price is a wash for the change interval. I will continue to use this motor oil as long as I can.

Chevy Suburban with 170K runs great with no oil consumption. This oil is expensive but worth the money.

Grew up using Amsoil ever since I was a kid and still using it to this today. The quality of the product is second to none!! Thank you for all that you do!

good oil use on boat too. got rid of mobile high mileage oil o 20

Greatest of all time, not much else to say about it.

I changed the oil on my 2022 Hyundai Elantra N before driving it back to Florida from New York. I drove the car up to NY and averaged 33.5 MPG. After making the first oil change with Amsoil Signature Synthetic I drove back and averaged 35.5 MPG. The only thing I can attribute this improvement to is the oil. That's the only change made to the car. I have used Amsoil Z Rod in my vintage Alfa Romeo and in Amszoil transmission oil in it's manual transmission and differential all with great results such as less gear wine and smoother shifts, so I now see the added MPG in my new car with your signature series oil. I'm a believer in your products!

Been using Amsoil in my vehicles since 2002 always seems to do me right.

I have been using this synthetic oil for over 25 years. I have used it in my 2011 Acura RDX since I've had this car, and now have over 100,000 miles and have never had to add any oil between changes. I will use nothing but Amsoil!!

Nothing but the best from Amsoil, from the shipping speed , customer service, and the best quality product you can ask for .

Great company with outstanding products. Ordering and shipping speed are really good

Been a customer for 10 yrs, keep raising prices, I’ll switch to other oils.

Put this in my 2020 Silverado and mileage went up by 2/mpg and truck runs cooler pulling my trailer

Amsoil is very good oil. My cavalier has 295k on the odometer, and I would like for it to last a lot longer.

Please make your 0W40 Signature Synthetic oil available in 5 Quart jugs and not just in 1 Quart bottles.

I've used Amsoil for many years, and it has always performed to the highest standards. I would, and I have recommended its use for any car, truck bike...anything that needs oil, this is the one...Edd

I use this oil in my Dodge Challenger 5.7 HEMI and have had amazing results. This oil makes my car run like a new engine after every oil change. I love it!

Amsoil is simple the best oil to keep your engine running for a long, long time!!!

Just great oil

I have been using Amsoil for may years in various vehicles and now prefer to use it in all of my vehicles.

I use your product in every thing I have that has an engine that requires oil.