| Date | Grandprix | Team | Winning Time | Leader Offset | Pos | Pts | Total |
| 08/03/1998 | Australia | Stewart | Retirement - Gearbox | 0 | 0 | ||
| 29/03/1998 | Brazil | Stewart | Retirement - Gearbox | 0 | 0 | ||
| 12/04/1998 | Argentina | Stewart | 108:36.175 | +2 laps | 10 | 0 | 0 |
| 26/04/1998 | San Marino | Stewart | Retirement - Accident | 0 | 0 | ||
| 10/05/1998 | Spain | Stewart | 93:37.621 | +1 lap | 5 | 2 | 2 |
| 24/05/1998 | Monaco | Stewart | Retirement - Rear Suspension | 0 | 2 | ||
| 07/06/1998 | Canada | Stewart | 100:57.355 | +1.21.512 | 5 | 2 | 4 |
| 28/06/1998 | France | Stewart | 94:45.026 | +2 laps | 10 | 0 | 4 |
| 12/07/1998 | Britain | Stewart | Retirement - Spun | 0 | 4 | ||
| 26/07/1998 | Austrian | Stewart | Retirement - Brakes | 0 | 4 | ||
| 02/08/1998 | Germany | Stewart | Retirement - Gearbox | 0 | 4 | ||
| 16/08/1998 | Hungary | Stewart | Retirement - Gearbox | 0 | 4 | ||
| 30/08/1998 | Belgium | Stewart | Retirement - Accident-1 | 0 | 4 | ||
| 13/09/1998 | Italy | Stewart | 77:9.672 | +1 lap | 10 | 0 | 4 |
| 27/09/1998 | Luxemborg | Stewart | 92:14.789 | +2 laps | 11 | 0 | 4 |
| 01/11/1998 | Japan | Stewart | Retirement - Hydraulics | 0 | 4 | ||