For the May-through-September period, the May STEO projects a U.S. average Refiner Acquisition Cost of crude oil that is about $4 per barrel lower than last month's forecast (Figure 1). Retail gasoline prices are about 17 cents per gallon ($7 per barrel) lower than in the prior forecast, reflecting a falloff in gasoline crack spreads as well as crude oil price declines. The uncertainties in gasoline crack spreads (and ultimately in retail prices) turn in part on which East Coast refineries will remain in operation this summer. Sunoco has indicated it will extend operation of its Philadelphia refinery through July. Trainer, a Philadelphia-area refinery that was idled last fall, could be restarted if ConocoPhillips' sale of that facility to Delta Air Lines is completed soon. Delta has indicated plans to start production during the third quarter.