A woman holds a nozzle as she refuels her car at a Costco gas station in Robinson Township, Pa., in this July photo.
A woman holds a nozzle as she refuels her car at a Costco gas station in Robinson Township, Pa., in this July photo. Gene J. Puskar AP
A woman holds a nozzle as she refuels her car at a Costco gas station in Robinson Township, Pa., in this July photo. Gene J. Puskar AP

U.S. gas prices dropping; S.C. again has nation’s cheapest

August 04, 2015 04:12 PM