OK, I know there is a good deal of info on this, but I can't seem to find the answer to my question. I want to convert my Grand Prix SC and Z28 to E85. I know there is tuning involved, but what if you don't have access to E85 all of the time? Say you travel and the area doesn't have it, but you are tuned for it. What happens? Can you just put 93 in and be down on power, or will it be bad for the engine? Thanks guys