Customer Ratings & Reviews

All my cars get the sig series. Perfect for daily performers.

I have a well built 500hp Chevy Avalanche and Amsoil is the only oil I fully trust to keep my motor alive.

From all the other brands I have used this is the one I like the most. It gives me good performance out my engine.

Signature Series 5-20 motor oil In my 2018 Jeep Wrangler Rubicon 3.6 V6. Totally the best ever. I had a rattle upon start up , hot engine or cold. I tried several different motor oils including the dealer recommended, it still rattled at start up. I researched endlessly, come to find out the factory says it's normal. Well I didn't like it. I used Amsoil in many other internal combustion engines , so I thought I give it a try. So happy I did it completely solved my rattle on start. I use in everything I own now. Thank you Amsoil.

Being using it for a really long time, makes the car really smooth

I am always going to use AMSOIL for all my cars. The engines run smooth and I have the peace of mind that this synthetic oil has a lot proven testing.

I redline my RAM almost every trip and went 17000km last oil change and could have gone another 5000km

I have been using only Amsoil products in all my vehicles for the last 15 years. It came by word of mouth from a friend/mechanic. 10 years ago I became a member and have saved a lot of wear and tear, not to mention the money I've saved. The final convincing came at the hand of said mechanic. I had him put gaskets in my 1999 HD from the crankcase up, as mine were starting to seep a little just from age and poor design. He said when he took the jugs off the cylinders still had the crosshatch pattern from the hone they did at the factory! Enough for me! It's all I use!

Never ran any high end synthetics so decided to try signature series, within 5 seconds of starting the motor; it has never run quieter. Barely any valvetrain noise on my 3.5L ecoboost, looking forward to seeing how it looks when I change it out in 11 months.

So far engine is smooth

Ive been using Amsoil Signature Series in all my rides for plus 20yrs. I usually keep my cars & trucks 150-200k miles or until the wheels fall off, trouble free, which i accredit to Amsoil. I've used it in vehicles that have had bad reputations for engine/trans breakdowns and had no problems. I highly recommend it.

Great product, been using for years, would definitely recommend!

Great oil, will continue to order as needed

Great oil, will continue to order as needed

Very happy with this product switching all my vehicles to amsoil 0W-20 signature series

Engine runs much smoother than previous oils after 5,000 miles from oil change

Superior product and amazing protection! Your vehicle deserves an oil this good!

When I purchased a new car for my wife I decide to only use the best because this was her retirement car. After all the research I’ve done which was extensive this is the only oil that I will use for my vehicle‘s and motorcycle.

I run this oil in my 2018 F150 5.0 V8 w/100k+, it keeps the motor internals clean. My truck does use some oil, but its due to the high vacuum on the pcv system drawing oil vapor into the intake manifold.

Simply the best there is. My mechanic turned me on to Amsoil close to 20 years ago and I have never looked back. I just changed the oil in my van at one year and 18000 miles. I could have waited longer even though the van has 179000 miles. Being an engineer means I understand how important oil is to an engine, so I will always run the best. Amsoil is the best. Period.