Customer Ratings & Reviews

Been using since my truck was new. Currently has 94K miles.

Oil last and stands up to the label

I used this oil for two and a half years and 25000 miles in the 6.7 liter Cummins engine in my Winnebago RV. This included a trip through Canada and all of Alaska and back. I changed the oil and sent a sample of it in for analysis. The results came back that the oil was still in perfect condition, and could have been run longer. Now that I have those baseline test results, I will sample it after 20,000 miles of use, and again after every 10000 additional miles. This will allow me to see how long I can run it before it really does need to be changed. So impressive!

I only use Amsoil in all my stuff. I have had motors so hot from loss of coolant that exhaust is red hot. With no damage to motor where another lubricated with standard oil would have cam and rod bearing failure. These oils continue to lubricate. They have saved me many times.

Have used Amsoil for all of my diesal oil needs, oil filter and fuel filter. Have always had great performance from Amsoil, more expensive than most but you get what you pay for. My brother-in-law is a diesal mechanic and states beyond any shadow of a doubt it's the best on the market. Will continue to be an Amsoil customer.

Great product, easy to order and quick delivery. Would recommend it to anyone with a deisel.

Very satisfied , been using for over 15 years on 1999 Ford F-350 7.3 diesel

I am a subscriber to Greg Alberalla’s YouTube channel. He speaks very highly of Amsoil products and always seems to do his research before using a product. I did some research on Amsoil and it’s a no brainer. I will only be using Amsoil products from here forward. I wish you guys made a substitute to bw 44-44 for my 4th gen Ram 2500 transfer case. Keep up the good work

I have a 6.0 with 260K and I’ve been using this since I got it at 130K and this oil makes a difference. Engine is quieter EOT is lower and when I drain it the oil is still good. I started using noting but Amsoil since 2003 when I did a dump compilation with my Harley and one second day of competition I switched and the bike made more HP and TQ and ran cooler. If you’ve ever seen a three ball friction test it will show you this stuff works. Worth every penny. Pay me now or pay me later. It is cheap insurance!

Great products! Run nothing but amsoil in my 03 Dodge , love there oil’s packages fast shipping won’t use nothing else!!

I’ve used AMSOIL for 20+ years and this signature diesel oil is the best money can buy period.

I really like your products I use them in my pick up truck my motorcycle and my lawn mower. I wish I could just go and pick it up

Oil arrived very quickly and well packaged.

I’ve been running Amsoil in all my Diesel trucks/cars (actually all my engines)for about 10yrs. Put the dual filter bypass systems on my trucks and run everything 15-25k miles, never a problem and they run better than the day I bought them.

All I use in my diesel trucks. Have never had a problem with buying high grade oil and other maintenance items from Amsoil. I run Amsoil in everything I own.

I have switched to Amsoil in my Dodge with a Cummings diesel. I have extended oil changes to the recommended mileage to change oil per the owners manual, as I had always changed before at 5000 miles. I am getting better fuel mileage with Amsoil, and the idle seems to have increased, maybe from less friction? Better Mileage and maybe less wear, that is money in my pocket.

I just reviewed this product, but I forgot to add that this oil is holding up to my towing an RV that is at the capacity of My GMC 2500hd Sierra. Just put 7000 miles towing and did not use a drop of oil and the oil pressure remains great.

I have been using Amsoil for about 10 years. It has never failed to protect my investment. I drive a lot so it is important to not have to worry about my oil. Just added bypass to my truck.

Truck runs smoother no ticks and has easier start ups in the harsh winter up here than truck manufacturer oil when truck was brand new

I’ve been using this oil in my 5.9 Cummins for about 5 years now. It runs like a champ.