Felipe Guimaraes became the winner of 2013’s Formula 3 Brazil Open at Interlagos after an engine issue took polesitter Roberto La Rocca out of contention, leaving Guimaraes virtually unopposed.
The outcome was a total reversal of the days that preceded the main race – where it was mostly Guimaraes who suffered from mechanical failures – as La Rocca had his race-ruining issue emerge on formation lap, forcing him to start from the pits and subsequently lose lots of time, finishing multiple laps down on the leader.
Guimaraes, who therefore started fifth, was first by the end of lap one and cruised to victory after 18 more laps. The only opposing driver who didn’t seem to encounter any problems, Russian Dmitry Suranovich, finished second, a minute down on Guimaraes.
The podium was completed by Eduardo Banzoli, who also took the honours of being the best “Class B” driver after his only competitor in that regard, Gustavo Lima, retired on lap four.
Raphael Raucci, who seemed to have a shot at the podium midway through the race, retired with five laps to go, allowing a recovering La Rocca to claim fourth.
Final race results
| Pos | Driver | Team | Cls | Time/Gap | Laps |
| 1 | Felipe Guimaraes | Hitech Racing Brazil | A | 31m16.716s | 19 |
| 2 | Dmitry Suranovich | Hitech Racing Brazil | A | +1m33.354s | 19 |
| 3 | Eduardo Banzoli | Capital Motorsport | B | +1 lap | 18 |
| 4 | Roberto La Rocca | Hitech Racing Brazil | A | +5 laps | 14 |
| 5 | Raphael Raucci | RR Racing Team | A | +6 laps | 13 |
| 6 | Gustavo Lima | Cesario Formula Jr. | B | +16 laps | 3 |