Helio Castroneves easily won the second Detroit Grand Prix race of the weekend Sunday, finishing 1.6836 seconds ahead of Penske Racing teammate Will Power.
Castroneves' lead was so large that when he made his final pit stop on Lap 49 he still was ahead when he got back on the track.
The competition got closer after cautions led to restarts with seven and three laps left, but Castroneves could not be caught.
The Brazilian has 29 IndyCar victories, tying Rick Mears for 11th on the career. Castroneves finished 0.060 seconds behind Ryan Hunter-Reay last week in the Indianapolis 500 in his bid to join Mears as a four-time winner in open-wheel racing's signature event.