Some gasoline station owners in Oklahoma are dropping the Venezuelan state owned Citgo brand, saying sales have dropped significantly since the VenezuelanPresident Hugo Chavez criticized President George W. Bush in a speech last month. The president of Tulsa based Arkansas Valley, a wholesale distributor which delivers Citgo gas to about 30 stations in Oklahoma and Missouri, said sales fell 10 percent to 15 percent after Chavez's United Nations speech in which he referred to Bush as “the devil.” “We started losing business at our stores,” company president Weister Smith told the Tulsa World newspaper. “Some of our independent retailers came...