19 janvier 1958 Circuit Oscar Alfredo Gálvez | Longueur : 3.912 km
| Pts | n° | Pilote | Châssis | Moteur | Pneus | Tours | Temps | Écart | Qualifications | Meilleur tour | ||||
| 1 | 8 | 14 | Stirling Moss (GBR) | Cooper T43 | Climax FPF | Continental | 80 | 2:19'33.7 | 7 | 1'44.0 | ||||
| 2 | 6 | 16 | Luigi Musso (ITA) | Ferrari 246 | Ferrari 246 | Englebert | 80 | 2:19'36.4 | +2.7 | 5 | 1'42.9 | |||
| 3 | 4 | 20 | Mike Hawthorn (GBR) | Ferrari 246 | Ferrari 246 | Englebert | 80 | 2:19'46.3 | +12.6 | 2 | 1'42.6 | |||
| 4 | 4 | 2 | Juan Manuel Fangio (ARG) | Maserati 250F | Maserati 250F | Pirelli | 80 | 2:20'26.7 | +53.0 | 1 | 1'42.0 | 1 | 1'41.8 | (30) |
| 5 | 2 | 4 | Jean Behra (FRA) | Maserati 250F | Maserati 250F | Pirelli | 78 | 2:21'11.4 | +2 tours | 4 | 1'42.7 | |||
| 6 | 8 | Harry Schell (USA) | Maserati 250F | Maserati 250F | Pirelli | 77 | 2:19'45.1 | +3 tours | 8 | 1'44.2 | ||||
| 7 | 6 | Carlos Menditeguy (ARG) | Maserati 250F | Maserati 250F | Pirelli | 76 | 2:19'34.1 | +4 tours | 6 | 1'43.7 | ||||
| 8 | 10 | Paco Godia (ESP) | Maserati 250F | Maserati 250F | Pirelli | 75 | 2:20'21.8 | +5 tours | 9 | 1'49.3 | ||||
| 9 | 12 | Horace Gould (GBR) | Maserati 250F | Maserati 250F | Pirelli | 71 | 2:19'37.8 | +9 tours | 10 | 1'51.7 | ||||
| Abandon(s) | ||||||||||||||
| halfshaft | 18 | Peter Collins (GBR) | Ferrari 246 | Ferrari 246 | Englebert | 0 | 3 | 1'42.6 | ||||||