During the yellow, many drivers decided to pit, including Power and Conway from first and second, but others decided to stay out, led by Castroneves and Andretti. Conway beat Power out of pit road but was ordered to give the position back after replays showed that Power had reached the pit lane blend line before Conway. On the restart, Andretti took the lead into Turn 5, and the leading quartet of Andretti, Castroneves, Dixon and Dario Franchitti rapidly distanced themselves from the rest of the field. Simona de Silvestro ran an impressive fifth, unable to keep pace with the top four but well ahead of sixth-placed Alex Lloyd. The drivers who had pitted under the caution, including Power, Conway, Ryan Briscoe and Justin Wilson were all stuck in the mid-pack.
Andretti was the first of the leaders to make his first pit stop and he did so on lap 29. Castroneves and Dixon went two and one laps longer, respectively, but rejoined behind Andretti after their stops. The pace of the top three was such that Andretti, Castroneves and Dixon were still first, second and third after their stops, still ahead of Tony Kanaan, Will Power and the others who had stopped before or during the yellow. Franchitti moved back to fourth after Kanaan and Power pitted, but was now 7 seconds behind the leaders. Power rejoined sixth, and set about chasing down fifth-placed Simona de Silvestro. He passed her on lap 48 to take fifth, but he was 21 seconds behind fourth-placed Franchitti and 28 behind the lead trio.
The leaders continued on in the same order as before, with Andretti making his second stop on lap 57 whereas Castroneves made his on lap 61, and Dixon on lap 60. This cycled Andretti back to the lead but, unlike Castroneves and Dixon, he did not have enough fuel on board to take him to the end. Andretti had now begun to hit traffic as the leaders began to lap the drivers at the tail of the field. This allowed both Castroneves and Dixon to close right up to Andretti, but Andretti was able to resist the pressure and keep them behind him. However, he was forced to make a quick fuel stop on Lap 82 and thus hand over the lead to Castroneves after having led for 58 laps. He rejoined fifth behind Franchitti and Power.
On lap 85, with five laps left, Simona de Silvestro spun her HVM Racing car in Turn 5, apparently stalling the engine. This brought out a full-course caution and bunched the field up. Dixon was right behind Castroneves, but third-placed Franchitti had many lapped cars in between him and the lead duo. When the green flew, it left a two-lap shootout to the finish. Castroneves finished half a second ahead of Dixon and took his 17th Indy Racing League win, and was the 23rd of his career. He broke a tie with Emerson Fittipaldi to become the winningest Brazilian driver in IndyCar history. It was also his first win as a father, as he held his daughter Mikaella in victory lane. Franchitti held Power off to take third, and Andretti had to make do with fifth. Ryan Briscoe finished sixth in the third Penske car, with Justin Wilson, Tony Kanaan, Mike Conway and Alex Tagliani rounding off the top 10. Remarkably, all 25 starters were running at the finish; 25th place runner Sato finished 22 laps behind the leaders after the KV mechanics repaired his car.
Classification
Qualifying
All cars were split into two groups of twelve, with the fastest six from each group going through to the "top 12" session. In this session, the fastest six cars progressed to the "Firestone Fast Six". The fastest driver in the final session claimed pole, with the rest of the cars lining up in session order, regardless of qualifying times. (fast six from 1–6, top 12 from 7–12 and round 1 from 13–25, with group 1 drivers occupying the odd–numbered grid positions, and group 2 drivers occupying the even–numbered grid positions.
