Consumer reports found that E15 causes a drop in fuel economy that's more than 15% [1], meaning you're burning ethanol with your gas for no apparent gain and to the detriment of the environment in the form of increased emissions.

Ironically, on top of it all you're actually increasing your dependence on fossil fuels since since e15 requires more fossil fuel to get you the same distance as e0.

Can someone explain the argument for ethanol-based fuels?

1. http://www.consumerreports.org/cro/2011/01/the-great-ethanol...