Customer Ratings & Reviews

I drive my car hard and sometimes tow. I always look for the highest quality oils to use. I like to do my own maintenance on all my vehicles. I like to know exactly what oil is being used. Amsoil is my choice for my car, truck and motorcycle. The signature series is the top of the line and that's what I look for.

I use AMSOIL Synthetic Signature Series in both my diesel pick up and my little gas car. Both are older with over 250K mi. and both run quite well - smooth and plenty of power. In the Northern Rockies winter can be tough on vehicles, especially without a garage. I count on AMSOIL and it has taken good care of me and my vehicles.

Worth every penny. AMSOIL is the best way to protect your investment. I used to go 25k between oil changes. I was driving 800 - 1000 miles per week. I plan on towing a lot in the near future. Between this oil and the bypass filtration kit for my pickup, I'll never have to worry about anything lubrication-related in my engine. The 15k oil change interval will be perfect.

Nothing but the best for my two Ecoboost vehicles

The best motor oil you can buy. I've been using Amsoil for years.

I changed all the fluids in my 2007 Toyota Tundra 100k service and replaced them with all AMSOIL synthetic products. It cost about $650 for the best AMSOIL products but I want to get another 100K out of the truck with no problems.

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.