Dixon tops opening IndyCar practice in Detroit
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| Scott Dixon |
Ganassi Honda driver Scott Dixon easily topped opening practice for the Detroit Grand Prix IndyCar race Friday morning with a time of 1m16.742s.
Dixon's time was 0.35s faster than Penske Chevy driver Will Power and 0.36s up on third quick Ryan Hunter-Reay in his Andretti Honda.
Graham Rahal and Colton Herta rounded out the top-5 in their Hondas.
7 of the top-10 times were turned by Honda powered drivers.
Practice 1 Results
| Pos | No | Name | Time | Diff | Gap | Speed | Engine | Team |
| 1 | 9 | Scott Dixon | 1:16.742 | –.—- | –.—- | 110.240 | Honda | Chip Ganassi Racing Teams |
| 2 | 12 | Will Power | 1:17.088 | 0.3464 | 0.3464 | 109.744 | Chevy | Team Penske |
| 3 | 28 | Ryan Hunter-Reay | 1:17.106 | 0.3642 | 0.0178 | 109.719 | Honda | Andretti Autosport |
| 4 | 2 | Josef Newgarden | 1:17.198 | 0.4563 | 0.0921 | 109.588 | Chevy | Team Penske |
| 5 | 15 | Graham Rahal | 1:17.220 | 0.4783 | 0.0220 | 109.557 | Honda | Rahal Letterman Lanigan Racing |
| 6 | 88 | Colton Herta | 1:17.225 | 0.4834 | 0.0051 | 109.550 | Honda | Harding Steinbrenner Racing |
| 7 | 26 | Zach Veach | 1:17.467 | 0.7249 | 0.2415 | 109.208 | Honda | Andretti Autosport |
| 8 | 27 | Alexander Rossi | 1:17.508 | 0.7662 | 0.0413 | 109.150 | Honda | Andretti Autosport |
| 9 | 21 | Spencer Pigot | 1:17.608 | 0.8661 | 0.0999 | 109.010 | Chevy | Ed Carpenter Racing |
| 10 | 30 | Takuma Sato | 1:17.656 | 0.9137 | 0.0476 | 108.943 | Honda | Rahal Letterman Lanigan Racing |
| 11 | 31 | Patricio O'Ward | 1:17.679 | 0.9372 | 0.0235 | 108.910 | Chevy | Carlin |
| 12 | 22 | Simon Pagenaud | 1:17.709 | 0.9669 | 0.0297 | 108.868 | Chevy | Team Penske |
| 13 | 18 | Sebastien Bourdais | 1:17.865 | 1.1227 | 0.1558 | 108.650 | Honda | Dale Coyne Racing with Vasser-Sullivan |
| 14 | 98 | Marco Andretti | 1:17.879 | 1.1370 | 0.0143 | 108.630 | Honda | Andretti Herta Autosport w/Curb-Agaj. |
| 15 | 59 | Max Chilton | 1:17.943 | 1.2016 | 0.0646 | 108.540 | Chevy | Carlin |
| 16 | 5 | James Hinchcliffe | 1:18.270 | 1.5286 | 0.3270 | 108.087 | Honda | Arrow Schmidt Peterson Motorsports |
| 17 | 14 | Tony Kanaan | 1:18.497 | 1.7552 | 0.2266 | 107.775 | Chevy | AJ Foyt Enterprises |
| 18 | 19 | Santino Ferrucci | 1:18.608 | 1.8665 | 0.1113 | 107.622 | Honda | Dale Coyne Racing |
| 19 | 7 | Marcus Ericsson | 1:18.641 | 1.8994 | 0.0329 | 107.577 | Honda | Arrow Schmidt Peterson Motorsports |
| 20 | 20 | Ed Jones | 1:18.686 | 1.9443 | 0.0449 | 107.516 | Chevy | Ed Carpenter Racing |
| 21 | 10 | Felix Rosenqvist | 1:18.687 | 1.9450 | 0.0007 | 107.515 | Honda | Chip Ganassi Racing Teams |
| 22 | 4 | Matheus Leist | 1:19.119 | 2.3768 | 0.4318 | 106.928 | Chevy | AJ Foyt Enterprises |