Action Express led all but three laps of an uneventful 15th hour during the Rolex 24.
Eric Curran was out front at the top of the hour in the No. 31 Cadillac before Filipe Albuquerque led most of the remainder in the No. 5 Cadillac. Helio Castroneves managed to take the point for three laps between pit stops in the No. 7 Acura.
After 510 laps, Albuquerque led Castroneves by 18.083 seconds, with Curran third, one lap down. Bruno Senna was fourth, four laps back, in the No. 32 United Autosports Ligier.
Chip Ganassi Racing teammates Sebastien Bourdais [pictured] and Scott Dixon ran 1-2 throughout the hour. Dixon did manage to lead Bourdais for one lap, with the pair running 2.695 seconds apart.
Four different cars led GTD during the hour. Bryan Sellers led twice in the No. 48 Lamborghini, with Franck Perera in the No. 11 Lamborghini, Pedro Lamy in the No. 51 Ferrari and current class leader Alvaro Parente in the No. 865 Acura taking turns out front.
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