2008 Peak Antifreeze Indy Grand Prix
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The 2008 Peak Antifreeze & Motor Oil Indy Grand Prix of Sonoma County was the fifteenth round of the 2008 IndyCar Series season. It took place on August 24, 2008 at Sonoma Raceway.[1][2]

A transporter carrying the Team Penske cars of Hélio Castroneves and Ryan Briscoe caught fire on the Wednesday before the race, destroying both cars.[3] Racing in a backup car, Castroneves won the race from pole position, snapping a 29-race winless streak after finishing runner-up seven times in the 2008 season prior to Sonoma.[4][2] The gap in the standings between Castroneves and points leader Scott Dixon closed by 35 points after Dixon finished 12th in the race.[4]