Customer Ratings & Reviews

This oil works great with E85... Best I have found from the major brands.

I have been using Amsoil for at least ten (10) years, it's a life, and engine saver!

I have been using these products for more almost 30 years. I trust them.

I'm finding this oil looks cleaner and it's viscosity appears to hold up longer than Mobil 1 after the same 10k miles. I will continue to use this oil in my 2016 Mustang GT. 52k miles already and still running strong.

Works great in my wife's Buick Verano. I also use the 5-30 and 10-30 signature series in our GM pickups. My 2003 Silverado has 293,400 miles and doesn't burn a drop of oil! Bought it with 90k on it and has had all Amsoil fluids in it ever since.

I used to be very sceptical of synthetic oil so I decided to try it in my company truck(not my company). The truck ran up 200,000 miles and still running strong with minimal oil consumpsion. My wife has a growing cleaning business and I do the maintenance on the cars. Using Amsoil I went from 5,000 mile changes to 15,000 miles using the Signature Series 5W-30. She now has fifteen cars in her fleet, that cuts my oil changes from forty five to fifteen, that is a tremendous labor savings for me and it actually saves money. I use Amsoil in all my vehicles now and it keeps them running strong. I recommend to anyone that asks that they need to try it out. Great Product

I run this Signature Series 5w-30 in nearly all my vehicles. Typically I see a 10% increase in gas mileage ( over an engine ran on conventional mineral oils ) on the interstate no matter what size engine. In one recent event, I blew a head gasket on a Quad 4 engine yet drove the car for about 10 miles. Observing the chocolate milk colored oil, the engine was not damaged as it was protected by Amsoil Signature Series lubricant.

When I buy any vehicle, I change to Amsoil Signature Series the first oil change and use nothing else thereafter. As a volunteer fireman, my vehicles are subject to being run at high speed while cold. Signature Series provides outstanding protection. Some have over 200,000 miles on them and none use oil.

Modern GDI engines require excellent oil to stay clean and handle everyday extremes. If you are using your cars maintenance indicator you might be exceeding other oils capabilities I know signature series gives me the best I can get

Yes Amsoil oils are more costly that many other oils. I keep my vehicles for decades and want the best oil protection I can get.

Best engine protection in an oil available! Change my oil once a year. Easy!

I have used only Amsoil in my 2005 Toyota pickup. I now have 205000 miles. I have never had a problem and still us no oil and have no oil leaks. Change every 25000 miles.

AMSOIL, the single best lubricating oil on the planet! The End

I use amsoil don all my vehicles

In my personal auto's

I can't think of anything negative to say

Made the engine run so quiet

Nothing really comes close to the performance of amszoil. I used for 15 years thsn switched the charger surpassed 1146000 miles yes million. After having trouble finding goid oil im back permanently...

You can put any oil in a new engine and call it good. I run my cars 200k+ that's when oil matters. Amsoil cools,cleans, seals and lubricates better than anything I have used and I have tried them all.

I drive for work 1,000 miles plus a week, I use Amsoil in my car along with my wife's... I have right at 300,000 on a 2012 Kia Soul and the motor is just as good and clean as the day I purchased. I save money as well... using any other other brand is crazy