PORSCHE RACING HISTORYJohn Rulon-Miller (USA)
1973
13 May 1973 - Euro GT GP Paris - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 17 | Porsche 911 Carrera RSR | GT3.0 | John Rulon-Miller (USA) | M.H.S.T.C. e V | 7th | 7th | 76 laps |
2 June 1973 - European GT Championship Imola - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| Porsche 911 Carrera | GT3.0 | John Rulon-Miller (USA) | 9th | 8th | 37 laps |
24 June 1973 - Euro GT Nivelles - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 25 | Porsche 911 Carrera | GT3.0 | John Rulon-Miller (USA) | MHSTC | DNF | 25 laps - DNS R2 |
8 July 1973 - European GT Championship Estoril - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 911 Carrera RS | GT3.0 | John Rulon-Miller (USA) | MHSCC | 9th | 9th | 9th | 73 laps |
2 September 1973 - Monza 6 Hours - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| Porsche 911 Carrera RSR | John Rulon-Miller (USA)/Martin Birrane (IRL) | ? | 31st |