| Runda | Tor | Data | Kierowca | Pojazd | Zespół |
|---|---|---|---|---|---|
| 1 |  St. Petersburg | 2015.03.28 | Van Diemen DP08 - Mazda | Pabst Racing | |
| 2 | 2015.03.29 | Van Diemen DP08 - Mazda | Pabst Racing | ||
| 3 | NOLA Motorsports Park | 2015.04.11 | Van Diemen DP08 - Mazda | Cape Motorsports | |
| 4 | 2015.04.12 | Van Diemen DP08 - Mazda | Afterburner Autosport | ||
| 5 | Barber | 2015.04.25 | Van Diemen DP08 - Mazda | Cape Motorsports | |
| 6 | 2015.04.26 | Van Diemen DP08 - Mazda | Cape Motorsports | ||
| 7 | Indianapolis | 2015.05.08 | Van Diemen DP08 - Mazda | Cape Motorsports | |
| 8 | 2015.05.09 | Van Diemen DP08 - Mazda | Cape Motorsports | ||
| 9 | Indianapolis Raceway Park | 2015.05.23 | Van Diemen DP08 - Mazda | Pabst Racing | |
| 10 |  Exhibition Place | 2015.06.13 | Van Diemen DP08 - Mazda | Pabst Racing | |
| 11 | 2015.06.14 | Van Diemen DP08 - Mazda | Cape Motorsports | ||
| 12 | Mid-Ohio | 2015.08.01 | Van Diemen DP08 - Mazda | Cape Motorsports | |
| 13 | 2015.08.02 | Van Diemen DP08 - Mazda | Cape Motorsports | ||
| 14 | Van Diemen DP08 - Mazda | Cape Motorsports | |||
| 15 | Laguna Seca | 2015.09.12 | Van Diemen DP08 - Mazda | Cape Motorsports | |
| 16 | 2015.09.13 | Van Diemen DP08 - Mazda | Cape Motorsports |
