Customer Ratings & Reviews

Used this oil in an Explorer ST. Appears to be high quality. Downside is buying one jug and two quarts to do a six quart oil change. The majority of manufacturers use a roughly 5 quart jug.

I bought a 2001 Suburban LT 4 wheel dive with the tow package in Sept 2000. I immediately had the oil changed to Amsoil the bbest most reliable synthetic oil on the market. I have used Amsoil ever since, The car now has 225,000 miles on it, I have serviced the engine at 100,000 miles The only mechanical problem I have had on this car is the Aternator shaft broke, which had nothing to do with the OIL.

Very very good oil, the best out there. Only problem the shipping, a liter came in leaking. All the cans were covered by oil. The shipper is very rough with the box. Bonjour du Quebec, Canada

great motor oil has quieted down lifters in a small block chevy with over 150000 miles

Shipment was fast and oil was worth the wait. I highly recommend the signature series.

If you want the best oil for your car or truck it's worth the price! Highly recommend!

Great oil that will last at least a year or more. Please market this oil in 4 or 5qt jugs since my car holds 10 qts.

I think this is the best oil you can buy. You also get great service and fast delivery.

Happy with the oil. Disappointed that I never received the free gift of rags but mostly being deceived by the P550794 Donaldson oil filter advertising. The advertising shows as an oversized filter and is actually a standard size filter. I never would have purchased.

I have been a user of AmsOil for sometime. Even though, I have no proof that it is better than any other, except for photos and videos provided by the company. I have not noticed any improvement in gas mileage, idle or oil pressure improvement. It does, however, make me feel better!

I am using AMSOIL from the first oil change. I have used it before in my OHV vehicles with great results. Right off the jump I see oil pressure up a little and oil Temps down. Seems to be getting a couple tenths better fuel mileage as well.

Been an Amsoil customer for years. I use it in all my cars.

I have been using Amsoil products for vehicle for the past 3 years. I have seen my car engine running smooth and quiet.

If there is a better oil out there, I don't know what it is. Facilitates cold weather starts; keeps engines clean and running like the day they were built. Expect to put hundreds of thousands of miles on most engines, using this oil, a good filter and doing regular, extended oil changes. Great stuff!

Bought my 11 Ram truck 2 year s ago changed all my fluids to Amsoil. Amsoil oil products have shown me nothing but awesome performance. 👍

I noticed a huge difference. Engine runs smoother with less sound, i will see in the lo g run if it maintains the engine running like this.

I was a diehard RP fan until I saw a comparison of the two in action. Amsoil is definitely superior all around

First time using this oil so don’t have much to tell at this time.

Ran this for 170k in a Subaru. Pulled the motor for the head gasket repair. It was actually incredible how clean the inside of the motor was. Highly recommend for longer intervals.

I’m getting about 75 miles further on a tank of gas in my economy car, I’m now putting AMSOIL synthetic oil in my Harley Davidson as well as my F 250 Powerstroke, I wish I would’ve known about this oil much earlier.