The Andretti driver lapped the 17-turn 2.9-mile course in 1m39.3721s, beating his 1m39.9303s effort from the morning session.
The opening two-and-a-half-hour session featured two red flags – both for harmless spin-and-stalls by Felix Rosenqvist of Arrow McLaren and Helio Castroneves of Meyer Shank Racing.
