"In my 6.0L PowerStroke it was truly incredible. My first refill at the same station and the same pump, I hand calculated 19.5mpg, that's around town with some freeway driving, it's usually an average of 16mpg. Also the power and performance level increase with this product in your fuel is a whole new experience. When towing heavy trailer loads of hay last weekend my low end power had increased substantially. The exhaust tone of the truck was also noticeably cleaner sounding and all gauge readings were in the sweet zone."
Senior Moderator, TheDieselGarage.com
Used it on my 99 Cummins and there is a noticeable difference in how it responds
This is the second bottle of AR6400-D I have ordered. I was very happy with the results after using the first bottle. Prior to using the first bottle, I would get P0401 code on me F350 with a 6.0 diesel pulling my 7700 pound travel trailer, especially on longer trips. After using the first bottle of AR6400-D, I pulled my new 15,000 pound 5th the wheel camper from Northern Indiana to Avon Park, Florida. I did not have a code of any kind pop up. First long trip with no worries at all. Great stuff!!!!!
one of the best fuel treatments I have ever used
I have an 03 F250 6.0 and back in august had two stuck injectors. Was quoted 2300 for their injectors and the labor. Had no other options at the moment. He suggested this and the ar9100. It completely freed up my injectors and gave the power back. It saved me over 2 grand and an extra day I didnt have to spare. So I have a bottle for every oil filter change. This stuff works.
Used the AR6400-G fuel system cleaner in a 2007 Prius that was getting 37 mpg around town.
Following treatment it increased to over 44. There was a big improvement on the highway as well.
Not sure if seasonal fuel formulation in my area is the reason mpg has dropped
a bit but overall the product has improved fuel efficiency in the Prius.