That's right, whisky. Scottish (where else?) researchers at Edinburgh Napier University have figured out a way to use the byproducts of their nation's most famous beverage as biofuel, capable of running in any normal engine. Like some other biofuels, no modifications to the car are needed, making it an easily adopted, if not easily made or found, alternative. During the making of whisky (in this case likely Scotch, rather than the more freedom-loving whisky of my own nation, the glorious amber elixir that is bourbon), two main byproducts are produced. "Pot ale" is the name for the leftover liquid in the stills, and "draff" is the leftover, used-up grains. Together, the pot ale and draff can be converted into butanol. Butanol can actually be burned in typical gas engines, but due to its higher cost and difficulty in producing, it's more likely to be added in smaller doses to regular gasoline-maybe 5% or 10%. Source - SmartPlanet.com