The 2005 Peak Antifreeze Indy 300 was Round 15 of the 2005 IndyCar Series. The event was held at Chicagoland Speedway in Illinois, United States on 11 September 2005. Danica Patrick started on pole position and Dan Wheldon was the race winner.
PEAK ANTIFREEZE INDY 300 Race Result
| Pos. | No. | Driver | Chassis | Engine | Tire | Started | Laps | Total Time | Laps Led | Status | Points | Avg. Speed | Pit Stops |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 26 | Dan Wheldon | Dallara | Honda | Firestone | 5 | 200 | - | 88 | Running | 53 | 169.16 | - |
| 2 | 3 | Helio Castroneves | Dallara | Toyota | Firestone | 11 | 200 | - | 11 | Running | 40 | - | - |
| 3 | 6 | Sam Hornish Jr. | Dallara | Toyota | Firestone | 4 | 200 | - | 0 | Running | 35 | - | - |
| 4 | 4 | Tomas Scheckter | Dallara | Chevrolet | Firestone | 3 | 200 | - | 38 | Running | 32 | - | - |
| 5 | 11 | Tony Kanaan | Dallara | Honda | Firestone | 13 | 200 | - | 46 | Running | 30 | - | - |
| 6 | 16 | Danica Patrick | Panoz | Honda | Firestone | 1 | 200 | - | 1 | Running | 28 | - | - |
| 7 | 17 | Vitor Meira | Panoz | Honda | Firestone | 20 | 200 | - | 0 | Running | 26 | - | - |
| 8 | 8 | Scott Sharp | Panoz | Honda | Firestone | 9 | 200 | - | 0 | Running | 24 | - | - |
| 9 | 83 | Patrick Carpentier | Dallara | Toyota | Firestone | 16 | 200 | - | 0 | Running | 22 | - | - |
| 10 | 95 | Buddy Lazier | Dallara | Chevrolet | Firestone | 7 | 200 | - | 0 | Running | 20 | - | - |
| 11 | 14 | A.J. Foyt IV | Dallara | Chevrolet | Firestone | 14 | 200 | - | 0 | Running | 19 | - | - |
| 12 | 27 | Dario Franchitti | Dallara | Honda | Firestone | 10 | 200 | - | 0 | Running | 18 | - | - |
| 13 | 15 | Buddy Rice | Panoz | Honda | Firestone | 2 | 200 | - | 5 | Running | 17 | - | - |
| 14 | 7 | Bryan Herta | Dallara | Honda | Firestone | 6 | 200 | - | 8 | Running | 16 | - | - |
| 15 | 24 | Roger Yasukawa | Dallara | Honda | Firestone | 15 | 200 | - | 0 | Running | 15 | - | - |
| 16 | 10 | Jaques Lazier | Panoz | Toyota | Firestone | 21 | 200 | - | 0 | Running | 14 | - | - |
| 17 | 20 | Ed Carpenter | Dallara | Toyota | Firestone | 19 | 199 | - | 0 | Running | 13 | - | - |
| 18 | 91 | Jimmy Kite | Dallara | Toyota | Firestone | 17 | 199 | - | 0 | Running | 12 | - | - |
| 19 | 9 | Scott Dixon | Panoz | Toyota | Firestone | 22 | 169 | - | 0 | Gear Box | 12 | - | - |
| 20 | 2 | Tomas Enge | Dallara | Chevrolet | Firestone | 8 | 140 | - | 3 | Suspension | 12 | - | - |
| 21 | 51 | Alex Barron | Dallara | Toyota | Firestone | 18 | 19 | - | 0 | Accident | 12 | - | - |
| 22 | 33 | Ryan Briscoe | Panoz | Toyota | Firestone | 23 | 19 | - | 0 | Accident | 12 | - | - |
| 23 | 55 | Kosuke Matsuura | Panoz | Honda | Firestone | 12 | 19 | - | 0 | Accident | 12 | - | - |