In thirty years, when rabbis will have issued a real prohibition against fueling with Ethanol on Pesach, people will find it hard to believe that this was a parody. (UPDATE: The New York Times caught the story [Times Select req'd].)
Of course, there is no (current) prohibition against deriving benefit from kitniyot, of which Ethanol is a derivative. I put “current” in parentheses because earlier last century kitniyot derivatives, like corn syrup, were permitted for use on Pesach as they fall under neither of the main “rationales” for kitniyot. This is no longer the case, with the Kosher for Pesach Coca Cola craze being a prime example. It wouldn’t surprise me if those who follow the mistaken custom of not consuming kitniyot on Pesach continue to expand the scope of the ban, much as they already have, until the innovated stringencies are so expansive that the people forget that kitniyot are not chametz. It is precisely in that type of atmosphere in which the ground would be fertile for a declaration that would prohibit even benefiting from kitniyot, Ethanol fueled vehicles included.
Many folks have extra sets of dishes for Pesach. Some people even have a totally separate kitchen for Pesach. Are we going to see special Pesach cars?