A widespread myth in energy circles is that U.S. refineries are “unable” to process the light, sweet crude produced by the shale boom. The claim tends to surface whenever gasoline prices rise or energy independence becomes a talking point. The argument is usually that the U.S. is producing record volumes of oil, yet still imports crude because its refineries were built for heavier foreign barrels. It’s a compelling narrative, but it’s mostly wrong. U.S. refineries can and do process shale crude every day. The issue isn’t…