| Year | Race | No | Team | Constructor | Model | CN | Engine | Spec | Gr | Ps | Laps | Retired | Pts | Formula | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 11 | 1970 | WEL | 11 | Bob Olthoff Motors | McLaren | M10A | 300-15 | Ford | V8 5.0 | 4 | 2 | 25 | 0 | SAF1 | |
| 10 | 1970 | CGG | 11 | Bob Olthoff Motors | McLaren | M10A | 300-15 | Ford | V8 5.0 | 0 | 2 | 0 | 0 | SAF1 | |
| 9 | 1970 | NATWI | 11 | Bob Olthoff Motors | McLaren | M10A | 300-15 | Ford | V8 5.0 | 5 | 3 | 55 | 4 | SAF1 | |
| 8 | 1970 | REP | 11 | Bob Olthoff Motors | McLaren | M10A | 300-15 | Ford | V8 5.0 | 7 | 3 | 39 | 4 | SAF1 | |
| 7 | 1970 | HIG | 11 | Bob Olthoff Motors | McLaren | M10A | 300-15 | Ford | V8 5.0 | 4 | 3 | 39 | 4 | SAF1 | |
| 6 | 1970 | CAPSE | 11 | Bob Olthoff Motors | McLaren | M10A | 300-15 | Ford | V8 5.0 | 6 | 2 | 50 | 6 | SAF1 | |
| 5 | 1969 | RANI | 5 | Bobby Olthoff Racing | McLaren | M3A | 3 | Ford | V8 5.0 | 7 | 3 | 39 | 4 | SAF1 | |
| 4 | 1968 | ROD | 5 | Bobby Olthoff Racing | McLaren | M3A | 3 | Ford | V8 5.0 | 4 | 3 | 50 | 4 | SAF1 | |
| 3 | 1968 | RANP | 5 | Bobby Olthoff Racing | McLaren | M3A | 3 | Ford | V8 5.0 | 7 | 3 | 40 | 4 | SAF1 | |
| 2 | 1968 | BO1 | 5 | Bobby Olthoff Racing | McLaren | M3A | 3 | Ford | V8 5.0 | 5 | 3 | 50 | 4 | SAF1 | |
| 1 | 1968 | CORON | 5 | Bobby Olthoff Racing | McLaren | M3A | 3 | Ford | V8 5.0 | 5 | 3 | 50 | 4 | SAF1 |
