As far as I am concerned the imposition of ethanol in fuel is a larger scam than global warming (not that it is unrelated to it). Ironically, it was the eco-nuts who first pushed it, and now the same eco-nuts (such as the Sierra Club) says it does not protect the environment! So why still have it? The corn lobby—that simple. And once again, the American people acting like lemmings accepts filling up their tanks with pseudo-fuel.
Ethanol costs more, it damages engine parts, and you get less mileage—all imposed on us by big brother.