Oil futures weakened Friday on indications that the U.S. crude-oil market is amply supplied. Light, sweet crude for April delivery fell 27 cents, or 0.3%, to $102.48 a barrel on the New York Mercantile Exchange. Prices are still poised for a weekly gain after reaching a four-month high earlier in the week. Brent crude on ICE Futures Europe wavered, recently trading up 2 cents at $110.32 a barrel. Domestic crude-oil supplies rose for a fifth straight week last week, the U.S. Energy Information Administration said. Market watchers expect supplies to expand further in the coming weeks, as refineries shut down units to perform maintenance and prepare to blend summer-grade gasoline. “There’s a lot of crude, and we haven’t fully started the spring maintenance season yet,” said Dominick Chirichella, analyst for the Energy Management Institute. Mr. Chirichella noted that supplies in the Gulf Coast, which has the largest concentration […]