Justin Wilson will go into Toronto qualifying among the favourites for pole after a superb performance in final practice this morning.
Having been second in both sessions yesterday, the Dreyer & Reinbold driver quickly took the top spot today. He was briefly pushed back to third by Penske's Helio Castroneves and Ryan Briscoe, before responding with a 1m01.1837s lap that put Wilson four tenths clear of the field.
KV's EJ Viso jumped to second near the end, 0.2889 seconds down on Wilson, while Friday afternoon pacesetter Ryan Hunter-Reay was third for Andretti Autosport.
Castroneves and Briscoe ended up fourth and sixth, split by Tony Kanaan in the next of the Andretti entries.
The session was twice halted by full course yellows, first when Raphael Matos crashed his De Ferran Dragon car at Turn 6, then later when Milka Duno (Dale Coyne Racing) had an incident at the first corner.
Pos Driver Team Time Gap 1. Justin Wilson Dreyer & Reinbold 1m01.1837s 2. EJ Viso KV 1m01.4726s + 0.2889s 3. Ryan Hunter-Reay Andretti 1m01.6058s + 0.4221s 4. Helio Castroneves Penske 1m01.6456s + 0.4619s 5. Tony Kanaan Andretti 1m01.7569s + 0.5732s 6. Ryan Briscoe Penske 1m01.8210s + 0.6373s 7. Marco Andretti Andretti 1m01.9328s + 0.7491s 8. Scott Dixon Ganassi 1m02.0128s + 0.8291s 9. Will Power Penske 1m02.0335s + 0.8498s 10. Dario Franchitti Ganassi 1m02.0782s + 0.8945s 11. Vitor Meira AJ Foyt 1m02.1302s + 0.9465s 12. Danica Patrick Andretti 1m02.1328s + 0.9491s 13. Graham Rahal Newman/Haas 1m02.3451s + 1.1614s 14. Alex Tagliani FAZZT 1m02.4661s + 1.2824s 15. Paul Tracy KV 1m02.4670s + 1.2833s 16. Hideki Mutoh Newman/Haas 1m02.5555s + 1.3718s 17. Takuma Sato KV 1m02.5684s + 1.3847s 18. Tomas Scheckter Dreyer & Reinbold 1m02.6024s + 1.4187s 19. Mario Moraes KV 1m02.7392s + 1.5555s 20. Mario Romancini Conquest 1m02.7443s + 1.5606s 21. Bertrand Baguette Conquest 1m02.8713s + 1.6876s 22. Simona de Silvestro HVM 1m03.1972s + 2.0135s 23. Alex Lloyd Dale Coyne 1m03.3187s + 2.1350s 24. Dan Wheldon Panther 1m03.5482s + 2.3645s 25. Raphael Matos De Ferran Dragon 1m03.7896s + 2.6059s 26. Milka Duno Dale Coyne 1m09.3390s + 8.1553s