I'm debating about whether or not to tune it to run faster for when I pull it out of storage this fall... I have a larger than stock turbo but I'm only pulling 13 lbs of boost.
Alcohol abuse!!
I am not completely sure, but I think the alcohol would sink to the bottom, and not mix too well. If you're gonna run pump gas, and want higher octane, I would suggest xylene. There's a cheap way to make your own, I would just do a search on this site.
Good luck, and crank up that boost!