Harding Steinbrenner Racing’s Colton Herta in the No.88 Capstone Turbines Honda was fastest in the opening practice at the Portland Grand Prix on Friday.
Herta set a fastest time of 57.4293s ending the session just ahead of Alexander Rossi and defending series champion Scott Dixon.
Series points leader Josef Newgarden in the No.2 Hitachi Chevrolet was fourth fastest just ahead of Marco Andretti and Arrow Schmidt Peterson Motorsports James Hinchcliffe in the No.5 Arrow Electronics Honda.
Zach Veach in the No.26 Gainbridge Honda was seventh just ahead of Felix Rosenqvist in the No.10 NTT DATA Honda for Chip Ganassi Racing.
Andretti Autosport’s Ryan Hunter Reay in the No.28 DHL Honda and Takuma Sato rounded out the top ten.
Team mates Will Power and Simon Pagenaud for Team Penske were 11th and 12th respectively.
Mathues Matt Leist of AJ Foyt Racing and Max Chilton were 13th and 14th.
Sebastien Bourdais in the No.18 Team SealMaster Honda for Dale Coyne with Vasser Sullivan Racing was 15th just ahead of Graham Rahal and Jack Harvey.
Ed Jones was 18th just ahead Santino Ferrucci and AJ Foyt Racing’s Tony Kanaan.
Spencer Pigot and Charlie Kimball were 21st and 22nd respectively while Comor Daly rounded out the order in 23rd place for Arrow Schmidt Peterson Motorsports.