AR6400-D (16 Oz) - Professional Diesel Fuel System and Engine Cleaner (Treats 25 Gallons of Diesel)

I recently purchased a Ford E-350 van with a 6.0L diesel that was used as a fire truck in Canada. Having only 51,000 miles and meticulous service records, I thought it was in top running condition. Being new to passenger diesels and learning about things like stiction and Cetane ratings, I was told by someone to try Seafoam as a fuel additive. After pulling my trailer to Montana this summer with Seafoam in the tank,I noticed a big difference in performance and thought it couldn't get any better, was I ever wrong! Many hours of research on various fuel and oil additives finally led me to Archoil. My order arrived and I followed the instructions on the bottle of AR6400-D. After fueling up (25 gallons as suggested) I jumped on the freeway to allow the fuel mix to get into the system. Within the first 20 miles, I noticed a significant difference in power, torque and responsiveness, it was INCREDIBLE...and this is in a well maintained, low mileage vehicle! I find myself having to watch my acceleration when leaving a stoplight, she just wants to go! I also ordered Archoil AR-9100 friction modifier for oil along with a bottle of AR-6200 fuel modification complex. Can't wait for the next oil change. The AR6400-D made a huge difference in performance and I'm sure the AR9100 will make a difference in protection and engine wear.

I own a 1980 Mercedes Benz 300CD. I used to use Lubro Moly Diesel purge. It was time consuming and had to be done frequently . With the Archoil 6400 you just have to pour it in before a fuel top off and what a difference it made. Smooth and powerful acceleration from the old girl! Quieter operation too. I also use the oil additive and it lived up to all the promises made by the manufacturer. Buy with confidence!

It worked and did improve mpg i use it on my 2013 peterbuilt cummins isx has been keeping my dpf running good

I will run this at every oil change from here on out! I wanted to run this prior to starting the every fill up cycle with Archoil...this stuff is AWESOME. I saw increased mpg (about 1.2), and the engine ran much smoother. 2010 F350 6.4 Powerstroke Diesel.

Engine starts easier and idles smoother. I have never achieved more than 16.5 mpg in suburban driving. Now I have 17.3- 17.4 on a regular basis. Highway mpg is 20- 21.5 . I gained 1 mpg on a regular basis.

Big fan of Archoil I use their products on just about everything my Diesel trucks as well as Their Gun lubricants and Rust removers A+ highly recommended

2006 F250 6.0Engine idles smoother and quieter and seemes more responsive. Have not had to opportunity to see if fuel mileage increased at this point

Really didn't see much of a difference in truck performance or gas mileage.