Will Power only completed a handful of laps in Friday's second IndyCar practice session at St Petersburg, but they were enough for the Australian driver to head a Penske one-two.
Power set his quickest time of 1m02.0077s on just his third lap and then sat out much of the rest of the session, returning to the circuit for the final minutes of running following a late red flag.
His team-mate Ryan Briscoe was second fastest, missing Power's time by just 0.08s. while reigning champion Dario Franchitti locked down the third-quickest lap to put himself just ahead of his Ganassi stablemates Graham Rahal and Scott Dixon.
Penske's Helio Castroneves was sixth, with James Hinchcliffe (Andretti), Tony Kanaan (KV), Ryan Hunter-Reay (Andretti) and Mike Conway (Foyt) rounding out the top 10.
It was a tough afternoon once again for series newcomer Rubens Barrichello, whose efforts were hampered by a still-to-be identified mechanical problem on his KV Racing car. The Brazilian finished the afternoon down in 23rd place, with a best lap 1.3s slower than Power's.
Simona de Silvestro narrowed the gap between Lotus and the Honda and Chevrolet-powered frontrunners, posting a time that was 16th quickest, and 0.9s off the leaders, in the HVM Racing entry.
Pos Driver Team/Car/Engine Time Gap 1. Will Power Penske DW12-Chevrolet 1m02.0077s 2. Ryan Briscoe Penske DW12-Chevrolet 1m02.0931s + 0.0845s 3. Dario Franchitti Ganassi DW12-Honda 1m02.2232s + 0.2155s 4. Graham Rahal Ganassi DW12-Honda 1m02.2924s + 0.8116s 5. Scott Dixon Ganassi DW12-Honda 1m02.3117s + 0.3040s 6. Helio Castroneves Penske DW12-Chevrolet 1m02.3190s + 0.3113s 7. James Hinchcliffe Andretti DW12-Chevrolet 1m02.4362s + 0.4555s 8. Tony Kanaan KV DW12-Chevrolet 1m02.4814s + 0.4737s 9. Ryan Hunter-Reay Andretti DW12-Chevrolet 1m02.5301s + 0.5224s 10. Mike Conway Foyt DW12-Honda 1m02.5337s + 0.5260s 11. Marco Andretti Andretti DW12-Chevrolet 1m02.5624s + 0.5547s 12. Simon Pagenaud Schmidt DW12-Honda 1m02.5997s + 0.5920s 13. JR Hildebrand Panther DW12-Chevrolet 1m02.7683s + 0.7606s 14. Josef Newgarden Fisher DW12-Honda 1m02.7838s + 0.7761s 15. Justin Wilson Coyne DW12-Honda 1m02.8915s + 0.8838s 16. Simona de Silvestro HVM DW12-Lotus 1m02.9136s + 0.9059s 17. James Jakes Coyne DW12-Honda 1m02.9152s + 0.9075s 18. Takuma Sato Rahal DW12-Honda 1m02.9594s + 0.9517s 19. Sebastien Bourdais Dragon DW12-Lotus 1m02.9778s + 0.9701s 20. EJ Viso KV DW12-Chevrolet 1m02.9857s + 0.9780s 21. Charlie Kimball Ganassi DW12-Honda 1m03.0904s + 1.0827s 22. Alex Tagliani BHA DW12-Lotus 1m03.1812s + 1.1735s 23. Rubens Barrichello KV DW12-Chevrolet 1m03.3290s + 1.3213s 24. Oriol Servia Dreyer Reinbold DW12-Lotus 1m03.3535s + 1.3458s 25. Ed Carpenter Carpenter DW12-Chevrolet 1m04.6031s + 2.5954s 26. Katherine Legge Dragon DW12-Lotus 1m04.7592s + 2.7515s