Scott Dixon had the fastest lap in the opening practice session for the Detroit Grand Prix. His best lap was 1:16.7418, a speed of 110.240 mph. Four Hondas and two Chevrolets occupied the top six spots. Will Power was second, 0,3464 seconds behind Dixon.
The rest of the top six – Ryan Hunter-Reay, Josef Newgarden, Graham Rahal, and Colton Herta. Spencer Pigot was the only other Chevy driver in the top 10, in ninth place. Alexander Rossi, one of this weekend’s favorites, was eighth quickest.
The session was green until Sebastien Bourdais found the runoff area in turn seven with about eight minutes left. He tried to spin the car around and continue, but the car stalled. The session resumed with about five minutes left. Felix Rosenqvist spun into a runoff area, but the session continued.
The next practice is at 2:50 and the results will determine tomorrow’s qualifying groups. Pit stop practice follows the practice session.