Driver Helio Castroneves drives during a practice session for the first IndyCar Detroit Grand Prix in Detroit, Saturday, May 31, 2014. (AP Photo/Dave Frechette)
Helio Castroneves runs through turn one during the second race of the IndyCar Detroit Grand Prix auto racing doubleheader in Detroit Sunday, June 1, 2014. (AP Photo/Paul Sancya)
From left, Ryan Briscoe, Scott Dixon, Tony Kanaan and Josef Newgarden sit on a barrier before driver introductions for the first race of the IndyCar Detroit Grand Prix auto racing doubleheader in Detroit, Saturday, May 31, 2014. (AP Photo/Carlos Osorio)
Helio Castroneves (3), of Brazil, leads the field through the first turn during the first race of the IndyCar Detroit Grand Prix auto racing doubleheader in Detroit, Saturday, May 31, 2014. (AP Photo/Carlos Osorio)
Will Power leads Simon Pagenaud through Turn 1 during the first race of the IndyCar Detroit Grand Prix auto racing doubleheader in Detroit, Saturday, May 31, 2014. (AP Photo/Carlos Osorio)
Michael Andretti, left, talks with driver Ryan Hunter-Reay after a practice session for the IndyCar Detroit Grand Prix auto race on Belle Isle in Detroit, Friday, May 30, 2014 in Detroit, Friday, May 30, 2014. (AP Photo/Bob Brodbeck)
Indianapolis 500 winner Ryan Hunter-Reay is seen in the pit area after a practice session for the IndyCar Detroit Grand Prix auto race on Belle Isle in Detroit, Friday, May 30, 2014. (AP Photo/Bob Brodbeck)
Driver James Hinchcliffe leaves the pit stall during a practice session for the IndyCar Detroit Grand Prix auto race on Belle Isle in Detroit, Friday, May 30, 2014. (AP Photo/Dave Frechette)
Driver Justin Wilson talks to crew members after a practice session for the IndyCar Detroit Grand Prix auto race on Belle Isle in Detroit, Friday, May 30, 2014. (AP Photo/Carlos Osorio)
Team owner Michael Andretti, left, talks with driver Marco Andretti after a practice session for the IndyCar Detroit Grand Prix auto race on Belle Isle in Detroit, Friday, May 30, 2014. (AP Photo/Dave Frechette)