One huge downfall to alcohol is that it's a drying agent and would ruin the seals in an engine, which in turn made the engine burn oil and hence pollute a lot more. Not to mention it pretty much required you to replace the engine, as that would cost less in labor than tearing it apart and rebuilding.<br><br>I think that issue has been worked out for awhile now and all cars can run on up to 20% ethanol, but the stigma looms and those that had an engine ruined won't likely be happy putting it in their tank.<br><br>Not sure about the numbers in this article, but it says this about ethanol:<br><br><blockquote><font size=1>In reply to:</font><hr><p>David Pimentel, an agricultural scientist at Cornell University and one of the foremost critics of ethanol, has conducted numerous cost analyses on ethanol production. He's made a name for himself mostly by driving the ethanol industry raving mad. From its very beginnings, when hoe enters soil, ethanol production has not changed much since the nineteenth century. Pimentel found that one acre of U.S. corn field yields about 7,110 pounds of corn, which in turn produces 328 gallons of ethanol. Setting aside the environmental implications (which are substantial), the financial costs already begin to mount. To plant, grow, and harvest the corn takes about 140 gallons of fossil fuel and costs about $347 per acre. According to Pimentel's analysis, even before the corn is converted to ethanol, the feedstock alone costs $0.69 per gallon of ethanol.<br><br>More damning, however, is that converting corn to ethanol requires about 99,119 BTUs to make one gallon, which has 77,000 BTUs of available energy. So about 29 percent more energy is required to produce a gallon of ethanol than is stored in that gallon in the first place. "That helps explain why fossil fuels (not ethanol) are used to produce ethanol," Pimentel says. "The growers and processors can't afford to burn ethanol to make ethanol. U.S. drivers couldn't afford it, either, if it weren't for government subsidies that artificially lower the price." All told, a gallon of ethanol costs $2.24 to produce, compared to $0.63 for a gallon of gasoline.<p><hr></blockquote><p>Link
<br><br>**edit - oooo wait here's a PDF of his research on the subject ->> Click me!!
<P ID="edit"><FONT SIZE=-1><EM>Edited by SgtBaxter on 06/17/05 06:22 PM (server time).</EM></FONT></P>