Poly, all of the fuels will require some kind of flushing sequence figured into the maintenance program. Some of the new methanol fuels have anticorrosive lubricants added already to help slow down corrosion. (ie: VP's M3 fuel). A 5 gallon pail will probably be the right amount for 1 day of thrashing at the track, so no old fuel lying around. I did forget about the flame visibility problem. Good point. Warning stickers on the car look to be in order.