It seems to make it run cleaner less smoke

I use All In One in my Duramax at every fill up. I've never had to replace an injector or fuel pump, and my mpg is higher than average according to a Duramax group. Coincidence? I think not.

I have use this product for 3 winter now and it works great.

Putting a li'l extra goodies in the fuel tank will keep my Duramax running strong for years to come!

Recently I just drove to Wyoming from Arizona and back on a hunting trip. I've made this trip several times in the past. The trip varies in elevation from 4500 up to 11,000 ft. On this trip I started using the Diesel All-In-One and I saw significant increases in power and fuel economy, especially in the higher elevations where my truck used to struggle a bit. Great product and works as advertised!!!

Little bit more mpg and piece of mind the injectors will last longer.

To early to tell. We’ll see.

... All-In-One gets ‘er done. One product, that keeps my diesel engines running great all year. I just trust Amsoil so I don't mess around with other additives any longer.

I only use the highest quality parts and fluids on my 2018 cummins. Amsoil is the best on the market! WORTH EVERY PENNY! Keep your lubricated parts the best they can be! From fuel additives too rear-end lube / front to back! Amsoil all the way. You won't be disappointed, LONG LIVE YOUR DIESEL!!!

Seems cleaner smoke not as black

This is by far the best diesel additive on the market. Thank you, Amsoil!

I only use our 2014 RAM 3500 with a 6.7 Ltr. engine, to tow our fifth wheel RV. Keeping the engine clean is a must and so far, I get 12-14 MPG towing in 5th gear and on the open road empty, I get 29-31 MPG (with a 3.73/1 gear ratio. I couldn't get that without the injectors working really well. I only have 40K on the odometer but I'm still happy putting the fuel additive into the fuel every 4K miles.

Since I started using Diesel All-in-One, my trucks and tractors start easier, smoke less under load and my fuel mileage/ horsepower has increased also.

Tractor fires up just as easy in the winter as it does in the summer! No worries about gelled fuel.

This all-in-one is my go to for my Cummins engine. It keeps it in optimal conditions and I trust Amsoil with my investments!

Helped increase mpg by 1 mpg.

Like this additive

I've been using AMSOIL in my GMC Duramax for 15 years now and still have the original injectors. No problems with the engine and great mileage compared to most that I know. If you want to increase the reliability and longevity of your diesel truck or car, use this awesome product, seriously.

Simple works great. Worth every penny. Definitely recommend.

2020 Ford F350,.....pushed me out to getting 22.7 mpg highway @ avg. 70 mph