Autódromo Juan y Oscar Gálvez · 19 January 1958
| Pos | Driver | Team | Race time / Gap | Laps | Stops | Pts | |
|---|---|---|---|---|---|---|---|
| 1 | Stirling Moss Cooper | Cooper | 2:19:33.700 | 80 | — | 8 | |
| 2 | Luigi Musso Ferrari | Ferrari | +2.700s | 80 | — | 6 | |
| 3 | Mike Hawthorn Ferrari | Ferrari | +12.600s | 80 | — | 4 | |
| 4 | Juan Fangio Maserati | Maserati | +53.000s | 80 | — | 4 | |
| 5 | Jean Behra Maserati | Maserati | — | 78 | — | 2 | |
| 6 | Harry Schell Maserati | Maserati | — | 77 | — | — | |
| 7 | Carlos Menditeguy Maserati | Maserati | — | 76 | — | — | |
| 8 | Paco Godia Maserati | Maserati | — | 75 | — | — | |
| 9 | Horace Gould Maserati | Maserati | — | 71 | — | — | |
| 10 | Peter Collins Ferrari | Ferrari | — | 0 | — | — |