| Date | Grandprix | Team | Winning Time | Leader Offset | Pos | Pts | Total |
| 08/03/1998 | Australia | Stewart | Retirement - Accident | 0 | 0 | ||
| 29/03/1998 | Brazil | Stewart | 97:11.747 | +2 laps | 10 | 0 | 0 |
| 12/04/1998 | Argentina | Stewart | Retirement - Transmission | 0 | 0 | ||
| 26/04/1998 | San Marino | Stewart | Retirement - Transmission | 0 | 0 | ||
| 10/05/1998 | Spain | Stewart | 93:37.621 | +2 laps | 12 | 0 | 0 |
| 24/05/1998 | Monaco | Stewart | Retirement - Rear Suspension | 0 | 0 | ||
| 07/06/1998 | Canada | Stewart | 100:57.355 | +1 lap | 6 | 1 | 1 |