In this Feb. 28, 2012 photo, a delivery driver connects hoses on a gasoline tanker, prior to replenishing the tanks at a BP station in Pittsburgh. The nationwide average for regular unleaded slipped less than a penny to $3.764 per gallon on Tuesday, March 6,2012. That ended a streak of price hikes that began on Feb. 8. (AP Photo/Gene J. Puskar)

Associated Press
In this Feb. 28, 2012 photo, a delivery driver connects hoses on a gasoline tanker, prior to replenishing the tanks at a BP station in Pittsburgh. The nationwide average for regular unleaded slipped less than a penny to $3.764 per gallon on Tuesday, March 6,2012. That ended a streak of price hikes that began on Feb. 8.  (AP Photo/Gene J. Puskar)
In this Feb. 28, 2012 photo, a delivery driver connects hoses on a gasoline tanker, prior to replenishing the tanks at a BP station in Pittsburgh. The nationwide average for regular unleaded slipped less than a penny to $3.764 per gallon on Tuesday, March 6,2012. That ended a streak of price hikes that began on Feb. 8. (AP Photo/Gene J. Puskar)
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