Castroneves held off fellow Acura Ricky Taylor's Wayne Taylor Racing Acura ARX-05 to secure his second straight win in the event, having won with WTR last year, while Tristan Vautier completed the podium in the leading Cadillac entered by JDC-Miller Motorsports.
The MSR Acura in which the team's full season drivers Jarvis and Blomqvist were making their debuts had to fight back from going down a lap in the fourth hour, when Castroneves was forced to the pits by a left-rear puncture.
