a bit of a tangent, i do not contribute $ to political campaigns at all, but I always vote. i love electric cars, as i love solar panels. but can't afford either. so for my (average $800) car I'll put in as much non petroleum fuel as i can. and from as local a source as possible. i am happy to pay the taxes. and happy to pay the extra 1cent per kw for renewable electron pumping sources. etc.
xist, i believe the highest alcohol/water concentrations that yeasts can survive in are 20-22% alc. by vol.
most of the aplicable laws for home made motor fuel would be about concentrating the alcohol by distiling or freezing. the home distilation laws are a hangover from prohibition that no social cause has gotten behind to overturn.
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