Crude futures dropped in early Asian trading on Friday after the release of a report showing that U.S. economic growth had slowed sharply, reinforcing concerns about sluggish demand in a world awash with oil. U.S. economic growth braked sharply in the third quarter as businesses cut back on restocking warehouses to work off an inventory glut, data showed. Both of the main crude benchmarks are on track to post their first weekly gains in three weeks, but with oil still being added to inventories, prices are likely to be rangebound in the coming weeks, traders and analysts said.