Everyone might drop in on Baylor U's flight research programs. The've
been flying numerous aircraft on everything from straight avgas to 100%
grain alcohol. They even have STC's for the O-235 and IO-540 series
engines to run on any percentage of ethanol. I know that one of the
prof's has been flying airshows in a couple of IO-540 powered bipes for
almost 25 years on staight 200 proof grain alcohol. Their research
should be able to answer virtually every question about running on
E(x)mogas

Craig C.