Well, a lot of things. The latest comes from the Wall Street Journal, which points out that most automobile warranties clearly state that only ethanol blends up to ten percent (E10) are covered (flex fuel vehicles being excepted, of course). If the nation's gasoline supply becomes full of E15, then who's responsible for fixing something when it breaks? While automakers are cautious (with good reason), American farmers are pushing for the higher ethanol blend. After all, about 25 percent of the corn grown in the U.S. already goes into the biofuel but the ethanol industry is still in trouble. A bigger slice of the pie would mean more demand for the yellow grain.
Photo by Frapestaartje. Licensed under Creative Commons license 2.0.