Will Power set the pace in the first free practice session for the Edmonton IndyCar Series race.
The Australian was 0.4sec clear of the field on a highly successful morning for Penske, which got all three of its cars in the top four as Ryan Briscoe and Helio Castroneves took third and fourth.
The trio were split by rookie Raphael Matos, who drives for the Luczo Dragon team run by Roger Penske's son Jay.
National hero Paul Tracy had been in front for much of the session, despite several spins and trips off the road, and ended up fifth for KV Racing.
Mike Conway continued his strong road course form for Dreyer & Reinbold to take sixth, ahead of compatriot Justin Wilson (Dale Coyne Racing) and Tracy's teammate Mario Moraes.
Ganassi had a low-key session, with Dario Franchitti and Scott Dixon only 11th and 12th, and the latter completing just 12 laps. There was no joy for Andretti Green either, as its highest runner was Hideki Mutoh in 10th.
The session saw plenty of incidents, including a spin into the barriers by Ryan Hunter-Reay (Foyt), a late rotation by Robert Doornbos (Newman/Haas/Lanigan) and several excursions for Dan Wheldon (Panther).
Conquest driver Alex Tagliani - the hero of the previous race in Toronto -- was slowest of all after hitting trouble early on.
TIMES:Pos Driver Team Time Gap
1. Will Power Penske 1m02.2840s
2. Raphael Matos Luczo Dragon 1m02.7084s + 0.4244s
3. Ryan Briscoe Penske 1m02.7561s + 0.4721s
4. Helio Castroneves Penske 1m02.7816s + 0.4976s
5. Paul Tracy KV 1m02.8520s + 0.5680s
6. Mike Conway Dreyer & Reinbold 1m02.9546s + 0.6706s
7. Justin Wilson Coyne 1m03.1026s + 0.8186s
8. Mario Moraes KV 1m03.1577s + 0.8737s
9. Robert Doornbos Newman/Haas/Lanigan 1m03.2693s + 0.9853s
0. Hideki Mutoh Andretti Green 1m03.3363s + 1.0523s
11. Dario Franchitti Ganassi 1m03.4095s + 1.1255s
12. Scott Dixon Ganassi 1m03.6812s + 1.3972s
13. Ryan Hunter-Reay Foyt 1m03.8273s + 1.5433s
14. Tomas Scheckter Dreyer & Reinbold 1m03.8464s + 1.5624s
15. Graham Rahal Newman/Haas/Lanigan 1m03.8524s + 1.5684s
16. Tony Kanaan Andretti Green 1m04.1162s + 1.8322s
17. EJ Viso HVM 1m04.1282s + 1.8442s
18. Richard Antinucci 3G 1m04.2159s + 1.9319s
19. Dan Wheldon Panther 1m04.6254s + 2.3414s
20. Marco Andretti Andretti Green 1m04.9379s + 2.6539s
21. Danica Patrick Andretti Green 1m05.3368s + 3.0528s
22. Ed Carpenter Vision 1m05.3386s + 3.0546s
23. Alex Tagliani Conquest 1m06.3707s + 4.0867s