| 11.1.1998 | Daytona Test | 6 | #E36/102292 | Said / Simo / Auberlen / Valentine / Bentley / Papadopoulos | Prototype Technology Group, Inc. | 28th |
| 11.1.1998 | Daytona Test | 7 | #E36 STC 95 020 | Said / Papadopoulos / Valentine / Auberlen / Donohue | Prototype Technology Group, Inc. | 25th |
| 11.1.1998 | Daytona Test | 12 | | Neuman / Pilgrim / Adam / Borcheller | Bell Motorsports | DNA |
| 11.1.1998 | Daytona Test | 54 | | Neuman / Pilgrim / Hernandez / Borcheller / Adam | Bell Motorsports | 27th |
| 1.2.1998 | 24 h Daytona | 6 | #E36/102292 | Simo / Cunningham / Quester | Prototype Technology Group | 67th |
| 1.2.1998 | 24 h Daytona | 7 | #E36 STC 95 020 | Bentley / Delano / Petery / Hill | Prototype Technology Group Inc. | 16th |
| 1.2.1998 | 24 h Daytona | 10 | #E36 STC 95 002 | Auberlen / Duez / Said / Cunningham | Prototype Technology Group | 6th |
| 1.2.1998 | 24 h Daytona | 54 | | Hayner / Taleb / Neuman / Borcheller | Bell Motorsports | 33rd |
| 21.3.1998 | 300 km Suzuka | 21 | | Hitotsuyama / Katou | Hitotsuyama Racing | DNF |
| 22.3.1998 | 12 h Sebring | 1 | #E36 STC 95 020 | Carter / Petery / Amati | Prototype Technology Group | 32nd |
| 22.3.1998 | 12 h Sebring | 6 | #E36/102292 | Cunningham / Bentley / Simo | Prototype Technology Group | 12th |
| 22.3.1998 | 12 h Sebring | 10 | #E36 STC 95 002 | Auberlen / Said | Prototype Technology Group | 11th |
| 22.3.1998 | 12 h Sebring | 54 | | de Quesada / Borcheller / Neuman / Varde | Bell Motorsports | 38th |
| 19.4.1998 | Belcar Zolder NRF | 26 | | Beckers / Stevens | Cassiers Serge | 22nd |
| 19.4.1998 | Belcar Zolder NRF | 32 | | Cuyvers / Beliën | BMW Beliën | 13th |
| 19.4.1998 | Belcar Zolder NRF | 34 | | van Kouwen / Van Elderen | Compact Racing | 23rd |
| 19.4.1998 | Belcar Zolder NRF | 35 | | Kieselmann / Kolczewski | Allruts Jörg | DNS |
| 19.4.1998 | Belcar Zolder NRF | 36 | | Brinkmann / Jaenen | Team Charly | 44th |
| 19.4.1998 | Belcar Zolder NRF | 37 | | Henkens / Gemoets | Haes Racing | 21st |
| 19.4.1998 | Belcar Zolder NRF | 42 | | Hubert / Dewinter | Rahier Luc | 14th |
| 19.4.1998 | Belcar Zolder NRF | 50 | | Van Lindt / Bertels | Deguise Johnny | 36th |
| 19.4.1998 | Belcar Zolder NRF | 60 | | de Wolf / Lenaerts | Geerts Roel | 30th |
| 19.4.1998 | Belcar Zolder NRF | 83 | | Qvick / Vermeiren | Qvick Yves | 38th |
| 26.4.1998 | 3 h 45 min Las Vegas | 1 | #E36 STC 95 020 | Cunningham / Bentley | Prototype Technology Group | 6th |
| 26.4.1998 | 3 h 45 min Las Vegas | 6 | #E36/102292 | Pilgrim / Said / Auberlen | Prototype Technology Group | 4th |
| 26.4.1998 | 3 h 45 min Las Vegas | 10 | #E36 STC 95 002 | Auberlen / Simo / Duez | Prototype Technology Group | 5th |
| 2.5.1998 | All Japan GT Fuji | 21 | | Hitotsuyama / Kinoshita | Hitotsuyama Racing | NC |
| 3.5.1998 | Belcar Spa SFD | 26 | | Beckers / Stevens | Cassiers Serge | 20th |
| 3.5.1998 | Belcar Spa SFD | 32 | | Cuyvers / Beliën | BMW Beliën | 11th |
| 3.5.1998 | Belcar Spa SFD | 34 | | van Kouwen / Van Elderen | Compact Racing | 34th |
| 3.5.1998 | Belcar Spa SFD | 36 | | Brinkmann / Bartlick | Team Charly | 33rd |
| 3.5.1998 | Belcar Spa SFD | 37 | | Henkens / Gemoets | Haes Racing | 44th |
| 3.5.1998 | Belcar Spa SFD | 42 | | Hubert / Dewinter | Rahier Luc | DNS |
| 3.5.1998 | Belcar Spa SFD | 44 | | Van der Kolk / de Bode | | 26th |
| 3.5.1998 | Belcar Spa SFD | 50 | | Van Lindt / Depondt | Deguise Johnny | DNS |
| 3.5.1998 | Belcar Spa SFD | 60 | | de Wolf / Michiels | | 19th |
| 3.5.1998 | Belcar Spa SFD | 83 | | Qvick / Vermeiren | | 36th |
| 17.5.1998 | 2 h 15 min Homestead | 1 | #E36 STC 95 020 | Bentley / Duez | Prototype Technology Group | 7th |
| 17.5.1998 | 2 h 15 min Homestead | 6 | #E36/102292 | Said / Simo / Auberlen | Prototype Technology Group | DNA |
| 17.5.1998 | 2 h 15 min Homestead | 10 | #E36 STC 95 002 | Said / Simo | Prototype Technology Group | 8th |
| 17.5.1998 | 2 h 15 min Homestead | 54 | | Newman / Pilgrim / Borcheller | Bell Motorsports | 15th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 1 | #E36 STC 95 020 | Bentley / Cunningham | Prototype Technology Group | 5th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 6 | #E36/102292 | Said / Duez | Prototype Technology Group | 4th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 10 | #E36 STC 95 002 | Auberlen / Simo | Prototype Technology Group | 7th |
| 14.6.1998 | 24 h Nürburgring | 1 | | Kather / Grohs / Deutgen / Funke | Dürener Motorsport Club e. V. im ADAC | 3rd |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 1 | #E36 STC 95 020 | Bentley / Simo | Prototype Technology Group | 11th |
| 14.6.1998 | 24 h Nürburgring | 3 | | Krankenberg / Schmickler / Oberndorfer / von Saurma-Jeltsch | MK-Motorsport | 9th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 10 | #E36 STC 95 002 | Auberlen / Said | Prototype Technology Group | 9th |
| 14.6.1998 | 24 h Nürburgring | 12 | | Schug / Scholz / Jodexnis / Mühlbauer | | 60th |
| 14.6.1998 | Belcar Spa PT | 12 | | Dierckx / Lievens | | 16th |
| 14.6.1998 | 24 h Nürburgring | 20 | | O'Dell / Mäkinen / Arho / Mätsala | Moore International Motorsport | 30th |
| 14.6.1998 | 24 h Nürburgring | 22 | | Orioli / Salvarini / Cappellari | Duller Motorsport | 5th |
| 14.6.1998 | Belcar Spa PT | 26 | | Beckers / Stevens | Cassiers Serge | 20th |
| 14.6.1998 | Belcar Spa PT | 32 | | Cuyvers / Beliën | BMW Beliën | 15th |
| 14.6.1998 | Belcar Spa PT | 34 | | van Kouwen / Van Elderen | Compact Racing | 21st |
| 14.6.1998 | Belcar Spa PT | 37 | | Henkens / Gemoets | Haes Racing | 18th |
| 14.6.1998 | Belcar Spa PT | 42 | | Hubert / Dewinter | Rahier Luc | 26th |
| 14.6.1998 | Belcar Spa PT | 44 | | Van der Kolk / de Bode | | 14th |
| 14.6.1998 | 24 h Nürburgring | 48 | | Müller / Peter / Witzmann | | 59th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 54 | | Newman / Pilgrim / Borcheller | Bell Motorsports | DNA |
| 14.6.1998 | 24 h Nürburgring | 58 | | Möller / Felder / Furtmayr | Renngemeinschaft Bergisch-Gladbach e. V. im ADAC | DNF |
| 14.6.1998 | Belcar Spa PT | 60 | | de Wolf / Lenaerts | | 46th |
| 14.6.1998 | 24 h Nürburgring | 68 | | Tischner / Thal / Tischner | | 19th |
| 14.6.1998 | 24 h Nürburgring | 69 | | Weiland / Weiland / Jodexnis | | 14th |
| 14.6.1998 | 24 h Nürburgring | 75 | | Robl / Hicks / Bell | Scuderia München e. V. im ADAC | DNF |
| 14.6.1998 | 24 h Nürburgring | 80 | | Tremblay / Vignon / Baudet | | 85th |
| 14.6.1998 | 24 h Nürburgring | 83 | | Bäder / Hagenmeyer / Schall | | 6th |
| 14.6.1998 | Belcar Spa PT | 83 | | Qvick / Vermeiren | | 36th |
| 14.6.1998 | 24 h Nürburgring | 84 | | Wolfsgruber / Gehring / Weis / Pfrommer | | 12th |
| 14.6.1998 | Belcar Spa PT | 95 | | Van de Velde / Jaenen | | 35th |
| 14.6.1998 | 24 h Nürburgring | 102 | | Springer / Kralik / Anspann / Deiser | | 16th |
| 14.6.1998 | 24 h Nürburgring | 126 | | Moore / Cox / McLaren | Moore International Motorsport | DNF |
| 14.6.1998 | 24 h Nürburgring | 145 | | Povey / Clarke / Donaldson | | 22nd |
| 14.6.1998 | 24 h Nürburgring | 185 | | Stillwell / Karaskas / Khan / Peeter | Sonera | 32nd |
| 14.6.1998 | 24 h Nürburgring | 186 | | Henderson / Bügler / Dürig / Baker | | 48th |
| 14.6.1998 | 24 h Nürburgring | 212 | | Lusuardi / Pindari / Sangiuolo / Gabellini | | 84th |
| 14.6.1998 | 24 h Nürburgring | 216 | | Scheid / Reck / Schlesack | Scuderia Augustusburg Brühl e. V. im ADAC | 4th |
| 21.6.1998 | 2 h Zeltweg | | | Brand / Matteuzzi | | 5th |
| 1998 | Alastaro | | | Frank Valle | | -/DNF |