It probably won't go very fast, but this biodiesel-powered Harley will do 89mpg... Pic: Autoblog GreenEarlier this month, the Fourth Annual Green Grand Prix took place in Watkins Glen, in New York. And guess what won their miles-per-gallon competition? A biodiesel-powered Harley-Davidson! In the Doris Bovee Memorial SCCA road rally, with 46 participants using ten fuel types, Bill Bolch’s
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