It doesn't hurt a thing. 352,000 on dads Cummins running red fuel. Never a problem
all we ever run is farm fuel... or red diesel. The way i see it, diesel is a byproduct of gasoline, so some greedy white collar buisness man is making a crap load of money off of me and every one else driving a diesel. I have got caught twice runing the red fuel. Both times i had a tractor hooked up to me and i was able to get out of it by telling the state trooper, my truck has farm plates, i use it to work, and this is a agricultural based vehicle. i get tax breaks, and discounts for my fuel, vehicles, and the land itself for the animals , my feed, and so on, so why should i run street diesel when this truck is registered as a farm truck? I don't know how, but it's worked......so far.