NEW YORK (AP) — Oil prices extended their retreat Tuesday, shedding $10 a barrel in a violent, two-day slide as tumult on Wall Street dims hopes for a swift economic recovery and signals another drop in U.S. energy demand. Crude, which shot up near $150 a barrel only two months ago, is now down 8 percent for the year. Meanwhile, gas prices edged higher at the pump, topping $3.85 a gallon amid the aftermath of Hurricane Ike. However, given crude’s continuing slide, retail gas was expected to turn lower within a few weeks.