Power leads Chevy 1-2-3 in practice 3 at St. Pete
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| Will Power |
Takuma Sato's AJ Foyt Racing Honda was the only thing preventing the Team Penske juggernaut from a 1-2-3-4 in practice 3 for the Firestone GP of St. Petersburg.
Will Power, Simon Pagenaud and Helio Castroneves were 1-2-3 for Team Penske using Chevy power, and the 4th Penske car, Juan Montoya, was 5th, just behind Sato.
Ryan Hunter-Reay was 6th in his DHL Honda, Scott Dixon 7th in the Target Honda, Graham Rahal was 8th in the Mi-Jack Honda, followed by Sebastien Bourdais and Charlie Kimball in Chevys.
Results
| Pos | No | Name | Time | Diff | Gap | Laps | Speed | Engine |
| 1 | 1 | Will Power | 1:01.362 | 0.000 | 0.000 | 17 | 105.603 | Chevy |
| 2 | 22 | Simon Pagenaud | 1:01.483 | 0.1214 | 0.1214 | 21 | 105.394 | Chevy |
| 3 | 3 | Helio Castroneves | 1:01.509 | 0.1471 | 0.0257 | 20 | 105.350 | Chevy |
| 4 | 14 | Takuma Sato | 1:01.512 | 0.1498 | 0.0027 | 16 | 105.345 | Honda |
| 5 | 2 | Juan Pablo Montoya | 1:01.544 | 0.1824 | 0.0326 | 18 | 105.290 | Chevy |
| 6 | 28 | Ryan Hunter-Reay | 1:01.637 | 0.2748 | 0.0924 | 18 | 105.132 | Honda |
| 7 | 9 | Scott Dixon | 1:01.798 | 0.4364 | 0.1616 | 17 | 104.857 | Chevy |
| 8 | 15 | Graham Rahal | 1:01.857 | 0.4952 | 0.0588 | 21 | 104.757 | Honda |
| 9 | 11 | Sebastien Bourdais | 1:01.894 | 0.5323 | 0.0371 | 20 | 104.694 | Chevy |
| 10 | 83 | Charlie Kimball | 1:01.984 | 0.6217 | 0.0894 | 18 | 104.543 | Chevy |
| 11 | 26 | Carlos Munoz | 1:02.029 | 0.6666 | 0.0449 | 22 | 104.468 | Honda |
| 12 | 10 | Tony Kanaan | 1:02.042 | 0.6797 | 0.0131 | 19 | 104.446 | Chevy |
| 13 | 8 | Sage Karam | 1:02.108 | 0.7455 | 0.0658 | 18 | 104.335 | Chevy |
| 14 | 4 | Stefano Coletti | 1:02.130 | 0.7677 | 0.0222 | 19 | 104.298 | Chevy |
| 15 | 27 | Marco Andretti | 1:02.132 | 0.7701 | 0.0024 | 19 | 104.294 | Honda |
| 16 | 20 | Luca Filippi | 1:02.144 | 0.7823 | 0.0122 | 17 | 104.273 | Chevy |
| 17 | 5 | James Hinchcliffe | 1:02.150 | 0.7883 | 0.0060 | 15 | 104.263 | Honda |
| 18 | 67 | Josef Newgarden | 1:02.160 | 0.7974 | 0.0091 | 24 | 104.248 | Chevy |
| 19 | 7 | James Jakes | 1:02.285 | 0.9227 | 0.1253 | 14 | 104.038 | Honda |
| 20 | 41 | Jack Hawksworth | 1:02.302 | 0.9396 | 0.0169 | 18 | 104.010 | Honda |
| 21 | 18 | Carlos Huertas | 1:02.391 | 1.0290 | 0.0894 | 22 | 103.861 | Honda |
| 22 | 25 | Simona de Silvestro | 1:02.410 | 1.0474 | 0.0184 | 17 | 103.830 | Honda |
| 23 | 98 | Gabby Chaves | 1:02.622 | 1.2603 | 0.2129 | 21 | 103.477 | Honda |
| 24 | 19 | Francesco Dracone | 1:04.871 | 3.5094 | 2.2491 | 23 | 99.890 | Honda |