Customer Ratings & Reviews

Been using this oil for a few years now and I really like it. It has long life and works well with the Amsoil filter.

I use Amsoil 5W 40 Signature Series in my 2016 F350 with the 6.7 Powerstroke. I have reviewed several different brands and Amsoil is always in the top. It is also very competitively priced compared to Motorcraft Full Synthetic 5W-40. I appreciate the fact I can have it delivered right to my door and not have to go to the dealership and hope they have Synthetic in stock.

Great product I wouldn’t use any other motor oil in my vehicles

Awesome stuff. Changed the feel and sound of my 6.0. Extremely happy with this oil.

I love their product that's highly recommended by Ram trucks but it costs ! Wish it was competitive with Rotella, Valvoline, and others.

I love this product and use only Amsoil products in my vehicles. It is the best product on the market. It out performs all other available synthetic products on the market.

Excellent product for its wear protection. Zero oil consumption. No worries when you occasionaly go past recommended oil change intervals. Oil temperatures stay lower under higher loads. 2.5 gallon container size is an added plus.

Use to use other motor oil on my Duramax and it would burn roughly a quart every 4k miles. Truck does not burn this stuff and oil still looks brand new after 3k miles. Highly impressed by it and recommend it.

very good quilty oil will be buying again

In my 2004 dodge diesel, which was purchased new, I have used Amsoil oil and filters since it's first oil change, about 490,000 miles ago, with no engine repairs required. I change the oil and filter once a year or about 25,000 miles. Highly recommend. I use Amsoil products in everything that needs oil, Tahoe, 4-wheeler, lawnmower, outboard motor, etc.

My Amsoil dealer ALWAYS gets my products to me way faster than expected!! The brand speaks for itself, so having the added excellent service keeps me coming back everytime!!!

Put the best stuff you can afford in your diesel. Amsoil checks all the boxes for me and helps keep my diesel running like new. I change my oil every 5000k miles. For the cost it’s cheap insurance for my motor.

Could not recommend more

One my 3rd oil change on my new duramax now. I don’t do the recommended 25000km I change at 10000km I idle a lot more then most so it gives me peace of mind

Purchased my Ram 2500 truck in 2015 and since then, I've used AMSOIL Signature exclusively since 2018. The truck gets decent mileage whether driving "normally" or towing my travel trailers. I've not experienced any engine related issues at all, knock on wood.

I've been a devote user of Amsoil for my oil changes and it has always kept me going.

I think the AMSOIL is the best oil on the market. The shipping is very fast. I usually receive the product the next day.

I have been using Amsoil for years now. The oil life and ease of getting it is great! I had my order delivered the next day after I ordered it.

My 2004 Cummins runs flawlessly with this motor oil

Been using for many years with great results. I have been changing my oil once a year with no Issues.