Customer Ratings & Reviews

Amsoil Signature Series oils really work! We presently use them in our 2916 RAM 1500, 2020 Jeep JT Gladiator and the V-Twin Synthetic in my 2003 Harley Road King Classic. On our last Jeep, 2011 JK Wrangler, our mechanic had to replace a seal that was not the oil pan but above the oil pan. When he looked up into the bottom of the inside of the engine, he said it was like brand new! That Jeep had over 100,000 miles on it at that time! Kept it for 10 years before getting the Gladiator! Thanks, JW.

I highly recommend Amsoil are use it in all of my stuff if you want a superior oil Amsoil is the one to use

I was comparing oil that I use with amsoil and decided to try it. It is more expensive than the other oil I have been using.

Been running thing in a 2006 Honda Accord for 180k miles....

Change oil in my Ram 5.7L Hemi about every 4000 miles. I have 168,000 miles on it. No leaks, no ticks and strong compression. Oil is never excessively dirty hen changed. This oil is fantastic.

Works like a charm! I even heard the turbo even more, I'm not sure if that's just me but it is a major difference from when I was running Pennzoil.

The best oil period. Very satisfied.

Go to “Project Farm” on you tube and see how Amsoil performs versus other oils. Objective testing not just testimonials ,

I have used Amsoil for my previous Chevy Cruze with the 5w30 signature series and the idle was smoother than Mobil 1. Now I use 0w20 for Subaru and I still have the great protection by Amsoil.

I had previously used Castrol, Mobil 1 and Valvoline synthetic oils and had no issues after 5,000 mile per changes. Since using Amsoil I'm able to extend the miles between changes with better milage and smoother engine idle. Amsoil sync burns cleaner and not as dark after 9.500 miles then the others did after 5,000. I have always used Wix extended life oil filters on all my vehicles...

Shipping was fast, great product! Worth every penny

Used this oil now for 4 years. Only have changed the oil twice. Excellent gas mileage in my F150 and motor runs quite.

This stuff is great, I was running different oil before I switched to AMS BOOSTED. Then with my car build I went with the Signature series and it’s preforming amazing.

always have used full synthetic motor oil,1st time now using amsoil. will keep tabs on overall performance and check dip stick regularly. can get hot here regularly and cold too. so far works well with ford 2.7L eco boost engine. also always use best 91 octane fuel. more to come,lets drive it

Excellent oil

Good product holds up under extreme conditions

Low mileage 5.3 in a GMC 4x4 crewcab. Because of direct injection i installed a catch can to help prevent intake valve carbon deposits. Previouly had been long time Mobile 1 user, with Mobile one i was draining several ounces of oil/blowby byproducts between oil changes. Since i changed to signature series amsoil there has been practically nothing in the catch can. Very significant in my opinion. Additionally this has been occasional towing of my 26ft boat. Im impressed and pleased and will be changing over my other vehicles to Amsoil as their oil changes come due. Thanks for a great product that is a cut above.

The signature series is the best of the best !!!

Changed the oil on my wife's 2005 Toyota 4runner and she noticed how much smoother the engine ran. We have over 400k miles and it still runs great. Always use AMSOIL!

Good oil.