Review on Restore Your Diesel Engine Performance With Archoil AR6400-D Fuel System Cleaner by David Alvarez

Cold start on my truck has been horrible. Rough idle stumbling until it warms up. I’ve put this on with a quarter tank then filled up. Within 50 miles the rough morning starts are much better. The truck runs noticeably smoother when warm with more power. My wife said it sounds quieter when I pulled up from work today. I know I had a semi bad fuel injector that was causing my rough idle in the morning. It seems to have clears it up.