I stopped at a gas station with my friend today for a cup of coffee after loading hay, there were 2 truck drivers at the register talking in another language, they went outside to the pump and started pumping e85 in the tractor fuel tank, truck had New Jersey plate on it, they unhooked the trailer on a side street. Any way my question is, is it ok to put e85 in a Diesel engine? I don't know if they just saw the yellow pump handle, and thought it was diesel fuel, or if they were trying to cut the diesel? I told my buddy, we should have waited until they left to see how much they put in the truck tank! Any one know anything about using that in a Diesel engine?