1958 Gran Premio Ciudad de Buenos Aires Heat 1
| Date | 02.02.1958 | Category | Formule Libre |
| Circuit | Autodromo Oscar y Juan Galvez | Championship | |
| Race title | XIV Gran Premio Ciudad de Buenos Aires Heat 1 | Round | |
| Distance | 30 laps = 141.18 km | Country | Argentina |
Winner's speed: n/a
Pole's speed: n/a
Fastest lap speed: n/a
| Rank | Pos. | # | Driver | Entrant | Car | Laps | Time | Status |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 24 | Mike Hawthorn | Scuderia Ferrari | Ferrari 246 2417сс V6 | 30 | 1:19'07.7 | finished |
| 2 | 2 | Juan Manuel Fangio | Scuderia Sud Americana | Maserati 250F [2529] 2490cc L6 | 30 | 1:19'39.5 | finished |