According to a report from the Associated Press, the U.S. Supreme Court is refusing to block the sale of E15, or gasoline with up to 15% ethanol, even though it may damage some vehicles, say opponents.

According to the AP, the Supreme Court rejected a challenge Monday by the American Petroleum Institute, the oil industry's chief lobbying group, to block sales of E15. The justices left in place a federal appeals court ruling that dismissed challenges by the oil industry group and trade associations representing food producers, restaurants and others.

Tom Buis, CEO of Growth Energy, an ethanol industry group, hailed the decision as victory for U.S. consumer, who will now have greater choice at the pump.

"Now that the final word has been issued, I hope that oil companies will begin to work with biofuel producers to help bring new blends into the marketplace that allow for consumer choice and savings," Buis said.

The API had argued that E15 was dangerous for older cars.

Putting fuel with up to 15 percent ethanol into older cars and trucks "could leave millions of consumers with broken down cars and high repair bills," said Bob Greco, a senior API official who has met with the White House on ethanol issues.