The American Petroleum Institute filed a federal lawsuit Tuesday challenging Obama administration regulations requiring biofuel to be mixed with conventional gas.

The suit, filed in the D.C. Circuit Court of Appeals, drew immediate criticism from the renewable fuels industry, which derided the action as “frivolous” and “slavish.”

The Environmental Protection Agency (EPA) issued the Renewable Fuel Standard in August, long after the agency’s statutory deadline in November of last year. The industry has repeatedly called the standards unworkable.

“EPA’s unrealistic ethanol mandates for 2013 are simply bad public policy,” said Harry Ng, American Petroleum Institute (API) vice president and general counsel. “EPA issued this year’s requirements nine months late and has once again mandated significantly more cellulosic ethanol than is available in the marketplace.”