Franchitti nejrychlejší, Enge se výrazně zlepšil
Argent Mortgage Indy - 3.trénink
| 
 p.  | 
Jezdec | Tým | 
 Čas  | 
 Kol  | 
| 
 1.  | 
Andretti Green Racing | 
 1:16.0676  | 
 10  | |
| 
 2.  | 
Target Chip Ganassi Racing | 
 1:16.3002  | 
 12  | |
| 
 3.  | 
Marlboro Team Penske | 
 1:16.3880  | 
 16  | |
| 
 4.  | 
Andretti Green Racing | 
 1:16.5530  | 
 13  | |
| 
 5.  | 
Andretti Green Racing | 
 1:16.5979  | 
 12  | |
| 
 6.  | 
Panther Racing | 
 1:16.9212  | 
 12  | |
| 
 7.  | 
Andretti Green Racing | 
 1:16.9283  | 
 9  | |
| 
 8.  | 
Marlboro Team Penske | 
 1:16.9642  | 
 16  | |
| 
 9.  | 
Rahal Letterman Racing | 
 1:17.0426  | 
 12  | |
| 
 10.  | 
Target Chip Ganassi Racing | 
 1:17.0433  | 
 12  | |
| 
 11.  | 
Target Chip Ganassi Racing | 
 1:17.1148  | 
 15  | |
| 
 12.  | 
Red Bull Cheever Racing | 
 1:17.1378  | 
 14  | |
| 
 13.  | 
Panther Racing | 
 1:17.5553  | 
 15  | |
| 
 14.  | 
Rahal Letterman Racing | 
 1:17.5934  | 
 12  | |
| 
 15.  | 
Red Bull Cheever Racing | 
 1:17.8298  | 
 14  | |
| 
 16.  | 
Delphi Fernandez Racing | 
 1:18.4052  | 
 14  | |
| 
 17.  | 
Rahal Letterman Racing | 
 1:18.4949  | 
 12  | |
| 
 18.  | 
Super Aguri Fernandez Racing | 
 1:18.7072  | 
 14  | |
| 
 19.  | 
A.J. Foyt Enterprises | 
 1:18.9970  | 
 17  | |
| 
 20.  | 
Dreyer & Reinbold Racing | 
 1:19.2792  | 
 12  | |
| 
 21.  | 
Vision Racing | 
 1:21.1721  | 
 11  | 
Všechny časy neoficiální

							Charles Leclerc se zasnoubil s Alexandrou Saintovou
							Sainz potrestán ztrátou 5 míst na startu v Mexiku

27.08. 2005