John Mahler Indianapolis 500 Stats
| Starts | Total Laps | Poles | Wins | Top 5 | Top 10 | Races Led | Laps Led | Winnings |
| 4 | 380 | 0 | 0 | 0 | 0 | 0 | 0 | $71,905 |
| Year | Finish | Start | Car Num. | Car Name / Entrant | Make / Model | Qual. Speed | Status | Laps | Led | Winnings |
| 1979 | 25 | 32 | 92 | Intercomp/Sports Magazine | Eagle / Offy / Goodyear | 184.322 | Fuel pump | 66 | 0 | $18,894 |
| 1978 | 26 | 17 | 39 | Tibon | Eagle / Offy / Goodyear | 189.723 | Timing gear | 58 | 0 | $16,330 |
| 1977 | 14 | 31 | 42 | Mergard 20th Century | Eagle / Offy / Goodyear | 185.242 | Running | 157 | 0 | $20,668 |
| 1972 | 22 | 29 | 31 | Harbor Fuel Oil | McLaren / Offy / Goodyear | 179.497 | Piston | 99 | 0 | $16,013 |