I've been using amsoil products for ten years or so and the proof is absolutely in the pudding you don't have to take my word or anybody else's just try it and you will judge for yourself five star service for a five star product thanks amsoil. I've been around diesels my entire 47 years.

We are currently on on 7500 mile trip out West and have added one ounce pure 5 gal. of diesel - towing a 5th wheel travel trailer. I run Amsoil 5w40 oil and a dual bypass oil filter system. Great products.

Great products from Amsoil . I have been using their products for years .

10 year old Duramax still going great.... always with AMSOIL

I try to use it every fill up my car runs very smooth and doesnt smoke as much. My 1991 mercedes 350sd gets much better mpg and hp. People are always asking if i did something to my car. Thank you

Love amsoil products they have always done my equipment and truck well would recommend to everyone

I think it's great

Use as instructed,it makes a positive improvement in performance

I feel that it has been working. I have great fast starts.

My Ram definitely runs smoother and starts faster and just performs better.

Very satisfied with products.

My Yanmar 420 hp Marine diesels ran 17 seasons, 2400 hrs and 38,000 miles with no service or repair to the fuel system other than filters. When we sold the boat the engines ran like new and passed the survey with flying colors. There is no better proof of a good product than this.

It is so helpful and we can tell the difference

I have used the Diesel injector cleaner on my 2005 Duramax with every fillup since I purchased it with 116,000 miles on it. I now 185,000 miles on it pulling a 35 ft Fifthwheel RV and have spent over 6 months pulling it over mountains and thru high plains they last three years. My injectors have yet to fail me and I attribute it to my use of this product. When I purchased the truck I changed all the engine and drive train fluids over to Amsoil. Nothing but the best for our Duramax.

Noticed Quicker throttle response and improved Horsepower with just one treatment Will continue using this product as directed (Yanmar diesel)

Our first f-250 had over 300,000 miles with an untouched 7.3 motor. Our current f-250 has 220,000 miles, 2001, 7.3 again with an untouched motor. This is the only additive we have used in almost 30 years.

Saved My Eng. from a complete Injector job , can't say much more then that. Use as recommended and I would say your troubles will be limited.

Have used this for years in diesel pickups (RAM Cummins), as well as Volkswagen diesels. Added at each fill-up. Kept everything running smoothly and clean. Just bought a diesel motorhome. That's next!

So far so good, can't say anything bad about it.

Keeps my "Vintage" '92 Dodge diesel running great!