Going Like Sixty
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If this innovation comes to market, you’ll soon be able to drive in to Starbucks to get your go-juice—and your car’s go-juice. It seems that coffee works very well as a biofuel. It takes about 5-7 kg of coffee grounds to get one liter of biofuel, at a cost of about a buck a gallon. Best of all, the coffee doesn’t have to be high quality. So that-oily tasting coffee you get at the Tim Horton’s or 7-Eleven will work just as good as the premium blends.  Creating fuel from the grounds uses the same procedure as other biodiesels, transesterification, which is sort of complicated to explain but fairly inexpensive. The US estimates we consume over 7 tons of coffee each year, which would yield about 340 million gallons of biodiesel.
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