Ronnie Thomas NASCAR Cup Series results at Ontario
Back to Ronnie Thomas career stats
| Year | Race # | Start | Finish | Car # | Sponsor | Engine | Owner | Crew Chief | Qualifying Speed | Laps | X Led | Laps Led | Status | Money | Points |
| 1978 | 30 | 32 | 30 | 25 | Louise Smith | Chevrolet | Don Robertson | 129 | 0 | 0 | engine | 1555 | 73 | ||
| 1979 | 31 | 18 | 27 | 25 | Stone's Cafeteria | Chevrolet | Don Robertson | 147 | 0 | 0 | engine | 3165 | 82 | ||
| 1980 | 31 | 26 | 38 | 25 | Stone's Cafeteria | Chevrolet | Don Robertson | 47 | 0 | 0 | brakes | 1340 | 49 |
