Customer Ratings & Reviews

The hype is real. You immediately notice your engine is running smoother when you switch to this. Had a valve cover off and it looked brand new underneath. Not 1 stain just brand new looking metal. Have gotten close to 25,000 miles before but changed due to towing and hard driving.

I have used AMSOIL products in all my equipment for about 40 yr.

Been using this product for over 20 years in all my Vehicles,ATV's and Lawn Equipment. Amazing Product with a company that actually backs up all there claims and provides all the product testing results. Also Customer service #1 with real people.

The only oil i will use.

After reading the article on full synthetic oil versus 100% synthetic oil I think the term full synthetic is a lie. I’ve shared the story with others and they cannot believe our legal system allows such a ruling. I guess money talks. But I am changing over to 100% synthetic for all my vehicles. I believe AMSOIL is the best oil on the market.

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