Dominic Dobson CART/Champ Car results at Portland
| Year | Race # | Start | Finish | Car # | Sponsor | Chassis | Engine | Tire | Owner | Qualifying Speed | Laps | X Led | Laps Led | Status | Points |
| 1986 | 5 | 19 | 19 | 24 | Leader Card | March | Cosworth | Goodyear | Leader Card | 76.462 | 12 | 0 | 0 | overheating | 0 |
| 1988 | 5 | 20 | 21 | 16 | Columbia Helicopters | Lola | Cosworth | Goodyear | Leader Card | 112.186 | 44 | 0 | 0 | turbocharger | 0 |
| 1989 | 6 | 17 | 18 | 86 | Texaco Havoline | Lola | Cosworth | Goodyear | Bayside | 115.597 | 78 | 0 | 0 | gearbox | 0 |
| 1990 | 6 | 21 | 24 | 86 | Texaco Havoline | Lola | Cosworth | Goodyear | Bayside | 114.112 | 30 | 0 | 0 | electrical | 0 |
| 1994 | 7 | 15 | 17 | 17 | PacWest | Lola | Ford | Goodyear | PacWest | 114.131 | 99 | 0 | 0 | flagged | 0 |
