HOUSTON, Dec 20 (Reuters) - The shutdown of a reformer at BPPlc's 413,500 barrel per day Whiting, Indiana, refineryhelped boost Chicago wholesale gasoline prices on Tuesday, saidtrade sources.
Chicago CBOB gasoline rose 4 cents to a 4-cent-a-gallonpremium over January gasoline on the New York MercantileExchange, traders said. (Reporting by Erwin Seba, editing by G Crosse)