Customer Ratings & Reviews

I'm towing my trailer with confidence with this oil !!

Pretty much the same price as the other Diesel oils, but way better! If you watch them test Amsoil versus other oils on Youtube, you will see the proof in the Cold oil test, hot oil test, and bearing test, that's all you need to see to know that Amsoil is one of the best oils in the world!

My brother uses this stuff in his Kubota compact tractor and swears by it.

Love the convenience, superfast ordering shipping most of the time overnight sometimes two days good pricing great customer service thank you

This product makes my engine purse....

Purchased the 15-40 Diesel oil for my Entegra Accolade with a Cummings diesel. Also purchased the Amsoil filtration by-pass system. Looking forward to many years of long distance traveling throughout the US with the added confidence of a super filtration system along with the quality and proven low viscosity breakdown of Amsoil diesel oil.

It runs very smooth and clean and I’m getting 1.5 mpg increase. I recommend this product.

I use this in a variety of cars and trucks gas and diesel cars that need a little thinner oil I use this My Buick passenger car has been running on this for years it's perfect for late model street cars and of course works great in late model diesels as well that require a 5W40

I’ve used this oil since truck was new. 102000 miles and CP4 fuel pump granaded The timing slipped in the process so front cover had to come. Engine was super clean. Highly recommended !!!

I use Amsoil 15W-40 in my Ford 7.3 turbo diesel and have racked up 154,000 trouble free miles. Amsoil signature series Diesel oil has been able to quiet injector knock and keep my old truck running like new. I Recommend Amsoil Signature Series to anyone who cares for their truck or car. I Do and absolutely Love Amsoil.

Trusted brand, Good product.

Great oil for the Hemi

This oil is tough! I won't put anything else in my trucks!

I only use this in my vehicle

Great oil and the price is great and shipping is always fast!

JUST GOT DONE PUTTING ON MY BANKS COOL RUNNER OIL PAN ON! AMSOIL IS THE ONLY OIL I USE ANYMORE!

I’ve been using this for about 100000 miles never had any issues. Even sent out sample for analysis. That confirmed it’s good to go.

This is an oil I have trusted for nearly 20 years. Thanks for everything.

My last 2 shipments the oil filter has been opened and exposed due to lack of better packing, top and bottom. This needs to be addressed

I use this in my Kubota tractor in warm weather. Tractor has over 1000 hours with no problems.