Awesome oil

Been a long time user and most recently in a 2015 Ram eco diesel. About 107,000 miles on it and has never leaked a drop, used a drop nor had any oil\engine related issues. Same with prior 1-ton Dodge dually and Ford F350 diesels. Shipping has always been quick and picking up from Orlando, FL on visits I've found the order ready and the folks helpful.

Very good quality, I use on my 21 silverado duramax, and I love it, I recommend this product

One and done per year. I like their products across the board.

I loved, this is the best synthetic oil for my Duramax Diesel engine

From cat equipment to my personal duramax this is the only oil I will ever use again! Thank you Amsoil for making a fantastic dependable product! I will be a customer for life

I have used Amsoil for years , in my opinion there is none better. Never find any other fluids in my vehicles,

Excellent oil,,, we only use the best in our trucks.

Your oil is better then others that I’ve used so I will continue to use

AMSOIL has been a part of my engine maintenance regimen for many, many years and has always out performed the competition.

Great so far!!

Quick delivery can’t beat Amsoil

By using this type of engine oil I found that my engine runs cooler, Fuel efficiency has also changed. Engine itself being diesel with this oil the motor runs quieter.

I tow approx 10k lbs pretty consistently (40-50% of my miles) and have always used Amsoil for the extended drain interval. With about 40k mi on my truck and approx 15k miles on my oil, I decided to send my oil to blackstone for analysis. I’ll spare you all of the details but will tell you that they noted that I could safely extend my oil change interval out approx 10k more miles, taking the oil life to 25k miles. While they may be true, I just stick with annual oil changes to keep it simple.

Best diesel oil yet. Engine idles smoother and feels like acceleration is faster. Cold weather starts are no problem. Highly recommend.

Been using Amsoil for many years! Best quality product on the market for synthetic oil.

I use the signature series diesel oil in my powerstroke , and i use this oil in our f150 - great oil results in both.

Have never used any other oil in my Duramax and will never. Amsoil makes having an account and ordering online super easy. Use in our Triton V10 motor home, GMC Denali, Jeep Wrangler, ‘05 Duramax, Honda Generator, stihl blower etc. lifer!

Fantastic oil, been using it for years.

12,000 miles on last oil change Amsoil oil still looked great