| 11.1.1998 | Daytona Test | 6 | BMW M3 | Said / Simo / Auberlen / Valentine / Bentley / Papadopoulos | Prototype Technology Group, Inc. | 28th |
| 11.1.1998 | Daytona Test | 7 | BMW M3 | Said / Papadopoulos / Valentine / Auberlen / Donohue | Prototype Technology Group, Inc. | 25th |
| 1.2.1998 | 24 h Daytona | 6 | BMW M3 | In entry list only | Prototype Technology Group | 67th |
| 1.2.1998 | 24 h Daytona | 10 | BMW M3 | Auberlen / Duez / Said / Cunningham | Prototype Technology Group | 6th |
| 22.3.1998 | 12 h Sebring | 10 | BMW M3 | Auberlen / Said | Prototype Technology Group | 11th |
| 13.4.1998 | 2 h 30 min Paul Ricard | 4 | Riley & Scott Mk III | de Radigues / Auberlen | BMW Team Rafanelli | DNA |
| 26.4.1998 | 3 h 45 min Las Vegas | 6 | BMW M3 | Pilgrim / Said / Auberlen | Prototype Technology Group | 4th |
| 26.4.1998 | 3 h 45 min Las Vegas | 10 | BMW M3 | Auberlen / Simo / Duez | Prototype Technology Group | 5th |
| 17.5.1998 | 2 h 30 min Brno | 4 | Riley & Scott Mk III | de Radigues / Auberlen | BMW Team Rafanelli | 2nd |
| 17.5.1998 | 2 h 15 min Homestead | 6 | BMW M3 | Said / Simo / Auberlen | Prototype Technology Group | DNA |
| 17.5.1998 | 2 h 15 min Homestead | 10 | BMW M3 | In entry list only | Prototype Technology Group | 8th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 10 | BMW M3 | Auberlen / Simo | Prototype Technology Group | 7th |
| 7.6.1998 | 24 h Le Mans | 40 | McLaren F1 GTR | O'Rourke / Sugden / Auberlen | Gulf Team Davidoff McLaren | 4th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 10 | BMW M3 | Auberlen / Said | Prototype Technology Group | 9th |
| 21.6.1998 | 3 h 45 min Road Atlanta | 10 | BMW M3 | Simo / Auberlen | Prototype Technology Group | 13th |
| 28.6.1998 | 1 h 45 min Minneapolis | 10 | BMW M3 | In entry list only | Prototype Technology Group | 9th |
| 4.7.1998 | 2 h 30 min Misano | 4 | Riley & Scott Mk III | de Radigues / Auberlen | BMW Team Rafanelli | DNF |
| 19.7.1998 | Tourist Trophy | 4 | Riley & Scott Mk III | de Radigues / Auberlen | BMW Team Rafanelli | DNA |
| 9.8.1998 | 2 h 45 min Mosport | 10 | BMW M3 | Auberlen / Simo | Prototype Technology Group | 9th |
| 16.8.1998 | 2 h 30 min Anderstorp | 4 | Riley & Scott Mk III | de Radigues / Auberlen | BMW Team Rafanelli | DNF |
| 23.8.1998 | 6 h Watkins Glen | 10 | BMW M3 | Auberlen / Simo | Prototype Technology Group | 26th |
| 6.9.1998 | 2 h 30 min Nürburgring | 4 | Riley & Scott Mk III | de Radigues / Auberlen | BMW Team Rafanelli | 3rd |
| 19.9.1998 | 2 h 30 min Le Mans | 4 | Riley & Scott Mk III | In entry list only | BMW Team Rafanelli | DNF |
| 19.9.1998 | 3 h Sebring | 10 | BMW M3 | Auberlen / Simo | Prototype Technology Group | 14th |
| 10.10.1998 | Petit Le Mans | 2 | Riley & Scott Mk III | Martini / Auberlen / de Radigues | BMW Motorsport | DNA |
| 10.10.1998 | Petit Le Mans | 10 | BMW M3 | Auberlen / Simo / Pilgrim | Prototype Technology Group | 17th |
| 25.10.1998 | 2 h 30 min Laguna Seca | 1 | BMW M3 | Auberlen / Cunningham | Prototype Technology Group | 17th |
| 25.10.1998 | 2 h 30 min Laguna Seca | 2 | Riley & Scott Mk III | de Radigues / Auberlen | BMW Motorsport | 1st |
| 25.10.1998 | 2 h 30 min Laguna Seca | 3 | Riley & Scott Mk III | In entry list only | BMW Motorsport | 28th |
| 6.12.1998 | 2 h 30 min Kyalami | 4 | Riley & Scott Mk III | de Radigues / Auberlen | BMW Team Rafanelli | DNA |