Mark Blundell, driving the No. 23 Ford Riley United Autosports with support from Michael Shank Racing, was leading the 49th Rolex 24 at Daytona International Speedway after six hours. A.J. Allmendinger lay second in the No. 6 Michael Shank Ford Dallara entry, followed by Max Papis in the first of the two Action Express Racing Porsche Rileys.
Buddy Rice was fourth in the second Action Express car and Joey Hand rounded out the top-five in the No. 01 Ganassi Racing BMW Riley, which lost a lap early in the race when the team had to replace the car's gear cluster to prevent the engine from hitting the rev limiter on the straights.
The No. 55 Level 5 Motorsports BMW Riley sat in sixth, one lap ahead of the third Michael Shank Racing car, the Krohn Racing Ford Lola, and the second Ganassi entry, which had been slowed by two flat tires and gearbox gremlins.
Two Rolex Sports Car Series title contenders were well behind the leaders at the six-hour mark. The SunTrust Racing Chevrolet Dallara was five laps behind the leaders after having spent time in the garage to fix damage caused by a collision with Juan Pablo Montoya. The Gainsco Bob Stallings Racing Chevrolet Riley was 27 laps down due to brake and steering issues, the latter the result of having been hit by Montoya.
In the GT class, the Brumos Racing Porsche led the way, followed by the Turner Motorsport BMW M3, the Paul Miller Racing Porsche, and the No. 67 TRG Porsche - all of which were on the same lap.
The tire issues that cropped up in the first few hours seemed to have subsided, as teams adjusted their camber settings and tire pressures to match the weather and the new pavement on the speedway portion of the track.