Customer Ratings & Reviews

Best product / oil you can buy period. Use it in all my vehicles especially my C6 Vette. External independent testing also indicates it's simply the best out there.

I have a 1997 Mazda Miata race car with 120,000 miles on it. The only thing I would consider putting in the engine is AMSOIL 10w-30 Signature Series. It gives maximum performance every time on the track.

I have used Amsoil since back in early 90’s. I see Amsoil that produces long lasting oil than any other oil I know of. I just drained used Amsoil oil, it darkened but the lubication is still there. My Ford Explorer towed Airstream Flying Cloud 19’ from California to West Virginia without any engine issues.

Very impressive with the oil. I notice the vehicle is running smoother and quieter. This product is very new to me. I will continue to monitor the performance.

Use this specially in the wifes wrx, 5k ool changes. The blackstone labs oil test I've done so far have come back great, only thing that they note is the oil is slightly below it's weight

Did not include the free Amsoil magnetic parts tray that was supposed to be included with all orders over $100 (which mine was). This is the second time they have failed to include a Amsoil premium with my order. ( A hat, I think.) Just no free advertising for Amsoil. Otherwise great products.

great, change yearly

Best motor oil ever made. Worth every penny.

For anybody that wants Longevity on their motor this is the way to go . Can’t said anything else to describe how satisfied I am with the product

Use all their products in my jeep. They hold up well and preform great under harsh environments.

Over a year ago I changed oil brands from Mobile 1 Extended Performance to Amsoil Signature Series OW-20, I could tell a big difference, especially past the 5000 mile oil change mark, on my 2013 Honda Civic Si. The Amsoil .20 micro filter also keeps my oil much cleaner, even better than the Royal Purple Oil Filers that I was using..

I will say this oil has always been my personal favorite because how synthetic it keeps your car well lubricated, motor running quiet as it should compare to other oils. 4 stars would've been 5 if AMS would've send me the gas enchanser like they promised for free

I love your product been use it since 1984

Great products, amsoil has a variety of products for all you needs, my strongest testimony is two Hondas odyssey, one 2002 with 250k miles and the 2006 had 378k miles unfortunately it was involved in a car accident and total loss but both trucks used signature series for years and no engine issues at all, oil change intervals were done every 12 months and never have an issue with solenoids, timing components or oil pressure, the 2002 model still running good and I use amsoil on more cars but so far this Hondas had prove me the quality of amsoil signature series

First used Amsoil back in Denver, not sure but late seventies early eighties. I had it in gas enines ( like what I am using in my Hybrid now) but I also used it in my 2002 VW Diesel Bug, both in Arizona and Hawaii. My 1970 Chevy Caprice went way long, and when I sold it, it was still going strong with over 200,000 miles on the Odometer. I talk about this Oil all the time. Introduced the oil for an off road bike, back Colorado, the guy was amazed.....Edd

Just switched to AMSOIL signature full synthetic this year (2023) for my two aging vehicles. One of them, my Hyundai Elantra has 382k (original engine, valve, rings, etc) and I change the oil every 5k miles. It has been 1000 miles since the last oil change and this oil seems to be keeping its color better than the previous brand, and I could swear the car is getting better gas milage. I have not measured the mpg, it's just my perception from knowing the car so well (I bought it new in 2007). I like the oil

Been using it for 7 years and never had an issue, did increase the MPG slightly and only need to change once a year.

I don't know what else I could say but the test results always prove this stuff is the best I was finding interesting when I drain it out it always has a lightly red hue to it as soon as it cools down it becomes black just an observation.. I plan on using this stuff for the rest of my life thank you amsoil

Will be putting this in my 05 Jeep and have no doubt it will perform as advertised, only oil I use in my vehicles, all six trucks, my lawn and garden equipment and my generators.

I've been using Amsoil since 2018 with my new Jeep Rubicon. I had always used Mobil1 but when my new 2018 Jeep was ready for oil change I I purchased 6 qts. of Amsoil 0w-20 signature Series I noticed no oil vapor smell and my Jeeps mpg improved and the engine was much quieter. When I traded it in for a new 2021 Jeep Gladiator Rubicon and continued to use the same Amsoil. at 23,000 I ordered Blackstone Lab to have ir tested. I just received the Lab report and they also were over impressed with fantastic results. It was like a new engine. I change my oil every 5,000 miles or twice a year, which ever comes first. John