Another thing that racers around here have found is that alcohol makes more of a difference in smaller displacement motors. Most of the guy that are running 540 and bigger motor have gone back to running gas as performance and constancy advantages that alcohol typically offers isn't being realized.

Several of us buy our alcohol from chemical companies and not racing fuel companies. If it's 99.8% methanol it's the same stuff. It's a natural gas derivative (or maybe I should say byproduct). I'm seeing references to VPs M1 and M5 and I don't know what that is but it sounds like marketing bs to charge more for it, and it's probably better in some ways but IMHO it's mostly marketing and not necessary.

Car dealers buy a drum, add number 5 blue dye to it and that's what they use as windshield washer fluid. We've been running it for years with the same results and have been paying around $110 a barrel for the past 3 or so years.