Mazda
Grand Prix of St. Petersburg
Race 1
St. Petersburg Street Circuit
1.8 Mile Street Course
35 Laps/63 Miles
March 10, 2018
| Finish | Start | Driver | Car # | Sponsor/Name | Chassis | Engine | Laps | Status | Points |
| 1 | 2 | Patricio O'Ward | 27 | CDMX Mexico City | Dallara IL-15 | Mazda MZR-R | 35 | 0:38:42.5587 97.651 | 31 |
| 2 | 4 | Santiago Urrutia | 5 | BSE | Dallara IL-15 | Mazda MZR-R | 35 | 0:38:49.1601 97.374 | 25 |
| 3 | 3 | Colton Herta | 98 | Deltro Energy | Dallara IL-15 | Mazda MZR-R | 35 | 0:38:52.9792 97.215 | 22 |
| 4 | 5 | Victor Franzoni | 23 | Mazda | Dallara IL-15 | Mazda MZR-R | 35 | 0:39:11.5196 96.448 | 19 |
| 5 | 7 | Shelby Blackstock | 3 | Starstruck/Gap Guard | Dallara IL-15 | Mazda MZR-R | 35 | 0:39:18.6755 96.156 | 17 |
| 6 | 6 | Ryan Norman | 48 | Journey | Dallara IL-15 | Mazda MZR-R | 35 | 0:39:22.0474 96.018 | 15 |
| 7 | 8 | Neil Alberico | 2 | Rising Star Racing/Gap Guard | Dallara IL-15 | Mazda MZR-R | 35 | 0:39:45.0156 95.094 | 14 |
| 8 | 9 | Dalton Kellett | 28 | K-Line Insulators USA | Dallara IL-15 | Mazda MZR-R | 34 | Flagged | 13 |
| -- | 1 | Aaron Telitz | 9 | Rice Lake Weighing Systems | Dallara IL-15 | Mazda MZR-R | -- | DNS, wrecked qual 2 | 7 |