WATKINS GLEN, New York — Marcos Ambrose passed Brad Keselowski on the final lap, and then held him off in a fender-banging duel to win the Sprint Cup race at Watkins Glen International Sunday for the second straight time. Kyle Busch was in control but was leaking oil on the track and skidded sideways coming out of the first turn of the final lap. Keselowski's No. 2 Dodge came off the side of the No. 18 Toyota and Ambrose followed Keselowski through. Ambrose and Keselowski battled side by side the rest of the way around the 2.45-mile layout, with neither giving ground before Ambrose moved in front heading to the checkered flag. Jimmie Johnson was third, followed by Sonoma winner Clint Bowyer and Sam Hornish Jr., giving Dodge two in the top five. “It was absolutely chaos at the end,” Ambrose said. “I had really burned off the brakes. I couldn't figure out where it (the oil) was coming from. It was just absolutely crazy at the end.” The oil had been spewing from the No. 47 of Bobby Labonte and ruined the day for Kyle Busch, who seemingly held a commanding lead heading to the white flag of the Finger Lakes 355. “In the end, nobody knew what was going on,” said Richard Petty, owner of Ambrose's No. 9 Ford. “They were slipping and sliding off the race track. Marcos might have known a little bit about it, but the rest of us didn't. Marcos stayed with it all day. Everything fell our way.” It didn't for Busch, who led 43 laps. “Kyle hit the oil,” said Dave Rogers, crew chief of Busch's No. 18 Toyota. “The 47 broke. You can see him, he just went by smoking. He left oil down all over the track. Kyle hit the oil and it allowed the 2 (Keselowski) to get to us.” Desperate for a win to move back into contention for the Chase for the Sprint Cup championship, Busch skidded sideways coming out of the first turn of the final lap. “Busch slipped up big in turn one,” said Keselowski, who suffered damage to the front of his car. “There was nothing he could do. We all checked up and Marcos was right on my bumper. We all just about spun out. We got to the inner loop, and again nothing but oil.” Ambrose slipped again in turn 10, but Keselowski couldn't drive past. Neither gave ground, and Ambrose forged ahead on the final turn, another hard right-hander, and turned away Keselowski's final charge on the outside. — AP