Representatives from oil refineries, union leaders and Governor John Carney gathered at the Delaware City Refinery to protest a federal rule requiring the purchase of renewable energy credits.
PBF Energy which owns the refinery says those rules which are resulting in ballooning costs.
The Wilmington News Journal reports that the oil refineries can either blend biofuels like ethanol or they can purchase the credits.
But Mike Carr, an executive director of a lobbying group that is pushing for clean energy jobs in rural areas, told the paper that PBF is merely seeking special treatment.
He said that the company is raking in record profits which are being turned over to the shareholders.