Customer Ratings & Reviews

I have used this Oil for more than 20 years. I pulled the heads off of my 5.3 Liter GM engine (Warped aluminum Heads) and was surprised at how clean the lifter galley was. The engine had 110,000 miles, on it, and the lifter galley was completely clean. No sludge, What-so-ever ! The same engine now has 215,000 miles and still running strong.

I purchased a 2012 F150, one owner with 216,000 miles. I wasn't sure what brand of oil was ran in this Ecoboost motor. Cam phaser rattle was present every morning. After 1 year of running Amsoil Signature Synthetic 5w-30 the cam phaser rattle is non-existent. The truck now has 236,000 miles. All I can say is, its worth the money; an insurance policy of engine protection. In a 4cyl, V6 and V8 engines I typically see a 10% increase in fuel mileage efficiency. It will pay for itself in the long run. I change the oil every 7,000 miles on the Ecoboost but my daughters cars I change the oil every year. Trouble free.

I recently bought a 2021 GMC serria once i got it home i right away changed the motor oil to Amsoil. After running my first oil change with the Amsoil i pulled a sample and had it sent out to be analized at a lab. The results were outstanding Amsoil is handsdown the best stuff to feed your engine. Great job guys

I have been an Amsoil user for many years and have never had a single problem with any of their products. I an putting a Jasper engine in an old frame will be using Amsoil products throughout.

I work in healthcare and end up driving quite a bit. I’ve done quite a bit of reading online and Amsoil consistently received the highest marks for engine protection. It’s a little bit more expensive, but I feel that it is a vastly superior product. I’ve switched to Amsoil for all of my vehicles.

This is the best oil in the industry

Tests have been done. Best rates on evaporation, flow at low temperatures and others. This is indeed a state of the art product.

Haven't used it yet.

Have been using it for years and has performed flawlessly.

0-40 in the Hellcat and Scatpack. 0-30 Signature in the 5.7. The best.

This is absolutely the best oil on the market, hand down. A must purchase for anyone that want their car on the road for years to come!

These was a remark different in the engine performance and the engine noise drop significantly.

Best oil I see in the market, I hav 2004 Toyota sequoia with 2014000 miles and still running strong I recommend the oil and filter

Since using 5w 30 My wife's SRX is not losing a quart of oil between changes.

Recently rebuilt a 2004 Dodge Dakota with a 3.7L engine. The engine had 148K coming out of a Jeep Liberty with no operational problems. Three thousand dollars later it is in my Dakota and I didn’t get the oil change to the installer soon enough so he put in a Brand-X 10W30. I ran it around town and out to the farm and it performed fine. Then I took a 100 mile trip and got a “oil pressure” light at highway miles near an overpass. Pulled over after killing the key. Oil was full and clean and the engine made no extra noises for the rest of the trip. Oil light would be off on start then come on during operations. So . . . I put in about two cups of Marvel Mystery oil and drive back the 100 miles staring at the light (ouch). Got my box with the filter and 5W30 signature oil and went strait to Pennzoil Lube. The engine was rattling a bit when I pulled up. The Band-X came out with much dark color but still looked clean on the stick. The AMSOIL filter and oil change made the engine purr like a kitten, and it has been ever since. Oil Pressure light went out.

The order was fine except they promised me funnels and gloves. When I used the codem they said it was not valid. So I ordered a kit. Then a few weeks laterm they sent me an email promising funnels and gloves IF I ordered more product. Fool me once, shame on you. Fool me twice, shame on me.

Great product! I especially see the difference when used in my Harley transmission. Shifts smother with no clunking.

This is all I run in my Corvette.

Running on my Subaru

This motor oil give me confidence in its protection but that’s only from what I’ve read about it. It’s outrageously expensive and it never goes on sale or offers rebates. Their prices only increase, so if you can afford it, it’s a good oil. I’m not sure if it’s twice as good as other premium synthetic oils that go on sale at half the price. Paying 100% more for something that’s 25% better is a choice you’ll have to make.