The court decision is a setback for the oil-and-gas industry, which opposes the use of E15.
While EPA has said cars made in 2001 or later can safely use E15, the oil industry contends it harms vehicles. It warns that most auto companies can or will void warranties for E15-related damage.
Getting E15 more widely available would also help the biofuels industry meet rising blending targets established by the Renewable Fuel Standard. But E15 is currently sold at only a handful of gas stations across the country.
The Renewable Fuel Standard requires refiners to blend 36 billion gallons of biofuels into traditional transportation fuels by 2022.
The oil-and-gas industry calls that need for E15 the "blend wall." The American Petroleum Institute is pushing Congress to repeal the mandate largely to avoid reaching that threshold. Opponents of the mandate say it unfairly props up the biofuels industry at the expense of traditional fuels. Supporters, however, argue that repeal would chill investment in new energy technologies. (The Hill, 1/15/2013)