Customer Ratings & Reviews

Best diesel oil on the market we protect our feet with amsoil.

I run only this in a higher performance engine

been using his product on my Silverado it has over 250000 miles on it and its running like new still best Whear protection I've ever had .

Excellent oil with great results. My truck runs smooth and no real engine heat issues during the summer. The Ford F150 with Turbo has the tendency to run hot. Truly, I believe this oil saved me from the dreaded oil leaks the F150's seem to get around 40 to 60K miles. Dumped all the manfactures fluilds and replaced all with the AMS OIL products.

Unlike many "synthetic" oils on the market , Amsoil Signature Series is 100% synthetic, and is very high quality. My engine stays cleaner and runs smoother , and I'm getting good gas mileage and performance as well. Much higher quality than the oil that Lexus/Toyota uses in their vehicles. I'd recommend Amsoil Signature Series oil to anyone who is serious about performance and maintaining their vehicle in perfect condition. It's so good that I got my family members to switch to Amsoil , and they notice the difference as well.

It is our first time using this product i can let you know later how it worked for us.

Great product. First time user, car seems to run smoother and quieter. As always, you pay for what you get !

Years ago I only used 20w50 for my Harley. But yeah was hard to get, a pain and inconvenience. But I'm back now! My work vehicle has approximately 2,000 miles on Amsoil engine oil and is the golden color still. I've drained the transmission fluid and changed the filter and it's smoother and both run cooler! The trans fluid is RED and still red just like it's supposed to be.The gas addictive has put a pep in the 4cyl step also! Amsoil products are almost to good to be as good as people say,but it really is absolute awesome stuff!!

Used on all 3 of my wife’s current/previous cars. All have been Ecoboosts that she would put on average 25k/year on in South MS heat. Last two cars made it 100-150k without any issues and always a clean engine and valvetrain with this oil at every 5k interval. Current 2023 2.0 bronco sport has 38k, quite valvetrain and smooth running as always.

I’ve used AmsOil now for just over a year. I have 4 vehicles, and going forward will only be using AmsOil products in all vehicles.

The price is good and the quality and shipping is great. Using on a 2005 gmc Yukon Denali with 208000 miles. So far everything is working good. Drove about 3000 miles with the new oil.

Have been using oil for couple years car is quieter at idle speed and runs smoother.

New to me Equinox 150k. Seems to run smother.

I like how they have the proof behind all of their products and that to a consumer adds trust and value knowing that it truly is protecting their engine in their vehicle

Oil pressure one up when switching to this oil

I have used the synthetic oil in my autos since - a long time ago! I wouldn't use any other oil in my auto.

This is a great oil. I am still working out the needed viscosity for my build. This was the recommendation from the Amsoil Tech department and is a great choice! I will be testing the 5W-50 soon and may go with that one for the more oil pressure registering on the gauge.

Hands down best oil ever i have used in my life. Great quality better than any other oil on market . Oil doesn't turn black on me like others

Great product - service is excellent. Very easy to order and very fast deliveries.

It’s just great oil!