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Old 08-09-2008, 07:04 PM
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Rzeppa Rzeppa is offline
Cruise Moab Chairman
Join Date: Aug 2005
Location: Kittredge CO, USA
Posts: 6,669

IIRC, race cars use methanol, not EtOH. But it's the same thought. Most xtOHs are lighter than water and thus float on water. Higher vapor pressure, lower flash point. And unlike "normal" hydrocarbons, they are very hygroscopic. Gasoline is primarily Heptane (7 carbons), with some octane (8 carbons) thrown in. EtOH is of course, 2 carbons with the OH thrown in at the end. Lower molecular weight, less efficiency per volume. That's why diesel is more efficient than gasoline - more carbons, higher molecular weight.
Jeff Zepp
Kittredge CO USA
1971 & 1976 FJ40s, 1978 FJ45, 1987 FJ60
Rising Sun 4WD Club, TLCA #4063
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