Both drivers were nursing their fuel mileage, hoping to stretch it to the finish. On the final lap, going into the third turn, Dixon ran out of fuel, and Franchitti slipped by to take the lead, win the race, and win the IndyCar Series championship.
The two drivers were carefully managing their fuel consumption in an attempt to reach the finish line.  On the last lap, entering the third turn, Dixon's car ran out of gas, allowing Franchitti to pass and take the lead, ultimately winning the race and claiming the IndyCar Series title.