i'm thinking about either alochol or propane again, this 110 octane at $3.75 when i want to go fast has got to stop. I'm torn between alochol and propane, the alochol is cheaper to start with, propane is cheaper in the long run. the big thing i really like about alochol is how it cleans out the engine, from what i've heard it des as good of a job as you would do takign the engine apart and cleaning it yourself. does propane help or hurt the engine? i couldnt' imagine it cleaning it out much, my biggest fear is that it would hurt the engine like nitrous can. I dont' see that happening sence it isn't highly combustable. its also been a while since i've looked at doing this, i know alochol raises the octane of the fuel, propane does the same thing right?