WASHINGTON — Fueling retailer Thorntons announced today that it will offer its branded E15 option, Unleaded15, at all 43 Chicago-area locations beginning this month. In response, Renewable Fuels Association President and CEO Bob Dinneen issued the following statement: "We are pleased to see E15's footprint growing throughout the country. Chicago consumers can now benefit from using a lower carbon, higher octane fuel blend that is approved for nearly 80% of today's automotive fleet. "This is also the first significant rollout of E15 in a reformulated gasoline market, designated by EPA in nearly 20 cities to help reduce smog levels with cleaner gasoline. That designation means E15 can be sold year-round in Chicago without being hampered by burdensome EPA gasoline volatility restrictions when the nation switches from winter to summer gasoline regulations."