Power leads final IndyCar practice
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| Will Power |
| IndyCar/LAT USA |
Penske Chevy driver Will Power maintained his mastery of the 2.385-mile Sonoma, California road course Saturday morning by dominating the final practice session for the GoPro Grand Prix of Sonoma. But today the gap back to the second fastest car was over 4/10ths of a second ahead Target Chip Ganassi Honda driver Scott Dixon.
Power's Penske teammate Ryan Briscoe was third ahead of Dixon's teammate Dario Franchitti with Sebastien Bourdais rounding out the top-5 for Dragon Racing.
Results
| Rank | Car | Driver | Engine | Time | Diff. | Gap |
| 1 | 12 | Will Power | Chevy | 1:17.5339 | 0.0000s | 0.0000s |
| 2 | 9 | Scott Dixon | Honda | 1:17.9725 | 0.4386 | 0.4386 |
| 3 | 2 | Ryan Briscoe | Chevy | 1:18.0682 | 0.5343 | 0.0957 |
| 4 | 10 | Dario Franchitti | Honda | 1:18.2186 | 0.6847 | 0.1504 |
| 5 | 7 | Sebastien Bourdais | Chevy | 1:18.2520 | 0.7181 | 0.0334 |
| 6 | 3 | Helio Castroneves | Chevy | 1:18.2549 | 0.7210 | 0.0029 |
| 7 | 28 | Ryan Hunter-Reay | Chevy | 1:18.5937 | 1.0598 | 0.3388 |
| 8 | 38 | Graham Rahal | Honda | 1:18.6666 | 1.1327 | 0.0729 |
| 9 | 11 | Tony Kanaan | Chevy | 1:18.6949 | 1.1610 | 0.0283 |
| 10 | 18 | Justin Wilson | Honda | 1:18.6966 | 1.1627 | 0.0017 |
| 11 | 27 | James Hinchcliffe | Chevy | 1:18.7066 | 1.1727 | 0.0100 |
| 12 | 26 | Marco Andretti | Chevy | 1:18.7385 | 1.2046 | 0.0319 |
| 13 | 77 | Simon Pagenaud | Honda | 1:18.7393 | 1.2054 | 0.0008 |
| 14 | 83 | Charlie Kimball | Honda | 1:18.8115 | 1.2776 | 0.0722 |
| 15 | 17 | Sebastian Saavedra | Chevy | 1:18.8997 | 1.3658 | 0.0882 |
| 16 | 98 | Alex Tagliani | Honda | 1:18.9732 | 1.4393 | 0.0735 |
| 17 | 8 | Rubens Barrichello | Chevy | 1:19.0199 | 1.4860 | 0.0467 |
| 18 | 14 | Mike Conway | Honda | 1:19.1867 | 1.6528 | 0.1668 |
| 19 | 6 | Katherine Legge | Chevy | 1:19.1942 | 1.6603 | 0.0075 |
| 20 | 4 | JR Hildebrand | Chevy | 1:19.2427 | 1.7088 | 0.0485 |
| 21 | 19 | James Jakes | Honda | 1:19.2731 | 1.7392 | 0.0304 |
| 22 | 5 | EJ Viso | Chevy | 1:19.4640 | 1.9301 | 0.1909 |
| 23 | 15 | Takuma Sato | Honda | 1:19.4777 | 1.9438 | 0.0137 |
| 24 | 22 | Oriol Servia | Chevy | 1:19.4890 | 1.9551 | 0.0113 |
| 25 | 78 | Simona de Silvestro | Lotus | 1:19.7419 | 2.2080 | 0.2529 |
| 26 | 20 | Ed Carpenter | Chevy | 1:19.7981 | 2.2642 | 0.0562 |
| 27 | 67 | Josef Newgarden | Honda | 1:19.8261 | 2.2922 | 0.0280 |