2 percent of all fuels sold—a tiptoe right up to the blend wall, assuming gasoline demand stays at its current level.
Ethanol backers have been pushing for years to sell fuels with 15 percent
ethanol as a logical step over the blend wall, and hailed Monday’s rule as a move in that direction.
But automakers have a different view. Most every vehicle made before 2001 can’t use more than 10 percent ethanol fuel without risking engine or fuel system damage (ethanol can corrode rubber in fuel lines.