April WTI crude oil (CLJ24) on Friday closed down -0.92 (-1.17%), and Apr RBOB gasoline (RBJ24) closed down -2.76 (-1.08%). Crude oil and gasoline prices on Friday erased an early advance and turned lower on Chinese energy demand concerns. Also, Friday’s stock weakness undercut confidence in the economic outlook and weighed on crude prices. Crude prices Friday initially moved higher after the dollar index (DXY00) dropped to a 7-week low. Crude prices came under pressure Friday after the president of China National Petroleum Corp’s Economics & Technology Research Institute said China’s oil dema…