Will you be fueling your car on used french fry oils in a few years? Will you plunk a bushel of corn into your auto’s Mr. Fusion? Or will you simply urinate into the tank — the trucker’s dream technology?

All ideas are fairly viable in a hippy Shangri-La where money doesn’t matter. But Popular Mechanics actually crunched the math to come up with the most economoically viable gasoline alternatives.

Their conclusions? Right now, electricity’s the big winner, followed closely by compressed natural gas and then… unbelievably… used french fry oil. Hey! Soon enough, you may be to fill up more than your bloated indiscriminate belly at the local McDonald’s… but your car’s as well!

How far can you drive on a bushel of corn? [Popular Mechanics]

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