Customer Ratings & Reviews

Been using the SS for about 10 or 12 years now. No problems at all!

Decided to breakdown and try this oil based on price, quality, and talking with Eben over “Synthetic Oil Protections” on YouTube recommendation. I was relatively impressed with the quality of the oil as well as every single amsoil product I have bought. I switched to this oil mid February after using A couple other National brands, so far I’ve put about 1000 miles on this oil and it still looks like it came out of the bottle. Overall, I am highly impressed, I look forward to future products as well as witness the longevity of my vehicles and engines with prolonged use with amsoil products. Solid 10/10 from me.

Put this oil in my 2010 Chrysler Sebring. So far, so good!

Lifter tick is now a thing of the past, this oil certainly did the trick!!

Best oil out there hands down. I run it in every vehicle i own and every vehicle my boss owns and my sisters. Your vehicle deserves the best and the best is amsoil!!!!

I am in the process of working through a recall with Fiat regarding the over consumption of oil. I decided to make the switch to Amsoil and see if I could notice any difference. I am the original owner of the vehicle with 82,000 miles. I immediately noticed significant improvement over traditional brands including Mobil 1. The car performed better, was quieter and felt better lubricated with the Amsoil. It is worth the extra cost to have better than new performance.

Started using this oil after seeing numerous positive comments. I can honestly say my Toyota Sequoia runs better and is actually getting better gas mileage. I am on my third oil change since using AMSOIL 5W30 oil. My truck has better pickup and starts quicker as well. I would strongly recommend the use of this product.

Great quality oil. One of the best profiles on paper and in real world use. My truck runs smoother and a little cooler when I'm running Amsoil SS oil.

Don't buy inferior lubricants use the Best.... AMSOIL

Engine doesn’t shake and noise reduction has gone down. Riding smoothly. Didn’t realize how fast the difference would make. Doing it to all my vehicles.

Have been using this in my Alfa Stelvio since the first required oil change along with an Amzoil filter (longer than OEM) and it always seems to drain out rather clean at 3K intervals - considering now extending oil changes to 5K without worries

I ordered this by mistake, it should have been 5W30 Sign

BEST OIL ON THE MARKET. IT INCREASED MY FUEL MPG ON HIGHWAY FROM 36 TO 41 MPG

Only use Signature Series in my vehicles.

This is the best oil I've ever used. I've been using Amsoil for years and it has really made a difference in performance, and engine temps.

I was looking for a good motor oil for my truck. Looked at several different brands before speaking with others that used the same AMSOil 0W40 I was really impressed with what other people had said. So I've using it ever since.

I have been using Amsoil for over 20 years, PI is a great product that gains fuel mileage for any vehicle. I pull a snowmobile trailer to NY several times a month in the winter. I recently purchased a Ford F150, the first time I pulled it I got less than 10 miles to the gallon! After having PI in the tank for 1000 miles, my fuel mileage was almost 11 miles to the gallon. It's a great product.

This is the oil I use in my vehicles, great product and highly recommend.

Used to use a different, but my friend informed me about this oil and since that day Amsoil is the only oil I use.