I found this article today:
Cliff notes: "Acetone is the god of all fuel additives, does everything those hokey fuel saver devices are supposed to do but don't, improves all aspects of engine performance at practically no cost, bow down to our god Acetone."
I'm torn as to whether I should laugh hysterically or take it as possible but with a grain of salt. I actually used acetone quite a bit when I was working at the PSU turbulent combustion lab and I can tell you that it burns incredibly well. I never mixed it with gasoline (we actually never burned gasoline) but I mixed a whole lot of other fuels and I have learned that changes in fuel mixture can make a big difference. As one wild example, we injected hydrogen while burning a hydrocarbon (forget which) and NOx emissions practically dissappeared. Nobody expected that. But gasoline with 0.1% acetone? Has anybody here tried it?