Customer Ratings & Reviews

I have been using this oil for years and my cars and trucks, all run cooler on this than they did on reg.oil. All of them start up easier in the cold weather and here it gets down below 0.Best oil I have found in my 74yrs. of life..

Used in all my vehicles. Season after season the best. An easier to read side window would be nice

This is the best motor oil on the planet. I have used it in all my cars with excellent results.

Amsoil 5-20 oil is great. I normally run it a little over 5k miles in my truck, no more then 7k miles, and don't notice a large drop in performance from then and after the oil change.

Great stuff

Great product! 2.5 to 3 mpg improvement!

I must use product

Great oil been using in my toyota tacoma I change the filter at 10k (EA) and complete drain at 20k. Truck doesnt smoke and runs great with 225k miles.

Will never try any other oil in my vehicle only run amsoil

This oil I use in my trailblazer and impala

I use this in my 2012 Silverdo with the 5.3 V8 and it is great. I run it for a year and forget about it. Keeps the engine clean and cool.

Amazing oil, the best you can buy, noticed improvements in mpg

Great stuff!

I've been using this oil in my 2010 Taurus SHO since I purchased it in 2012. I've been on an annual oil change for most of that time, but recently changed to twice a year after I had the oil analyzed to see the impact the turbos had. While the oil was holding up, it was clear that a more frequent oil change was warranted. I've used this oil in my wife's car and the predecessor of the SHO. I also use this in my 1977 Corvette (albeit a different grade) -- so all my vehicles are protected.

Have been using amsoil since its start before being called amsoil. Had a ford explorer for 13yrs 278,000 miles. Still had factory compression specs when I sold her.

I have a 2007 Buick Terraza 3.9L V6. I have used Amsoil Signature Series 5w-30 since I bought it with 19000 miles. It now has 158000 miles on it. First thing I noticed when I switch to Amsoil was a smoother idle. Gas mileage increased 2 miles per gallon. Even with 158000 miles the gas mileage has stayed consistent at 19 in the city and 25 on the highway. I change my oil once a year with 12000 miles on the oil.

I use this in my brand new Subaru after 600 miles. Been happy as a pig in poop since. Been using Also in for 15 years in everything I own. Very satisfied.

Perfect in my cars all year round

I live in a cold climate, even at -36 there is no need to plug my vehicles block heater in.

The best.