| 17.5.1998 | 2 h 15 min Homestead | 04 | #WP0ZZZ99ZWS393001 | Morton / Graham / Huisman | C.J. Motorsports | DNA |
| 17.5.1998 | 500 km Silverstone | 56 | | Hürtgen / Ortelli | Roock Racing | DNF |
| 17.5.1998 | 500 km Silverstone | 61 | | Graham / Velay / Smadja / Neugarten / Ruch | Elf Haberthur Racing | DNA |
| 23.5.1998 | 6 h Misano | 28 | #WP0ZZZ99ZTS393107 | Smith / Grassi / Ligonnet | Seikel Motorsport | 1st |
| 23.5.1998 | 4 h Misano | 28 | #WP0ZZZ99ZTS393107 | Smith / Grassi / Ligonnet | Seikel Motorsport | 2nd |
| 23.5.1998 | 4 h Misano | 29 | #WP0ZZZ99ZTS394075 | Monteiro / Monteiro | Estoril Racing Team | DNA |
| 23.5.1998 | 6 h Misano | 29 | #WP0ZZZ99ZTS394075 | Monteiro / Monteiro | Estoril Racing Team | DNA |
| 23.5.1998 | 4 h Misano | 37 | #WP0ZZZ99ZTS393082 | Buttiero / Sangiuolo | RWS Brun Motorsport | DNF |
| 23.5.1998 | 6 h Misano | 37 | #WP0ZZZ99ZTS393082 | Buttiero / Sangiuolo | RWS Brun Motorsport | DNF |
| 24.5.1998 | British GT Croft | 33 | #WP0ZZZ99ZWS393003 | Saunders / Saunders | Gaumont/Parr Motorsport | 12th |
| 24.5.1998 | British GT Croft | 40 | #WP0ZZZ99ZTS394067 | Day / Astley | P K Sport | 9th |
| 24.5.1998 | British GT Croft | 50 | #WP0ZZZ99ZWS393004 | Morrison / Lister | Blue Coral/Slick 50/Quaker State | 7th |
| 7.6.1998 | 24 h Le Mans | 60 | #WP0ZZZ99ZTS394074 | Jarier / Rosenblad / Donovan | Ets Chéreau | DNF |
| 7.6.1998 | 24 h Le Mans | 62 | #WP0ZZZ99ZWS393001 | Morton / Graham / Grohs | C. J. Motorsport | DNF |
| 7.6.1998 | 24 h Le Mans | 66 | | Maassen / Price / Robinson | Roock Racing | DNPQ |
| 7.6.1998 | 24 h Le Mans | 67 | #WP0ZZZ99ZWS393011 | Neugarten / Smadja / Lagniez | Elf Haberthur Racing | DNF |
| 7.6.1998 | 24 h Le Mans | 68 | #WP0ZZZ99ZTS393085 | Maury-Laribiére / Graham / Poulain | Elf Haberthur Racing | 20th |
| 7.6.1998 | 24 h Le Mans | 71 | #WP0ZZZ99ZTS394075 | Monteiro / Maisonneuve / Monteiro | Estoril Racing | DNF |
| 7.6.1998 | 24 h Le Mans | 72 | #WP0ZZZ99ZWS393010 | Goueslard / Yver / Chéreau | Larbre Compétition | DNF |
| 7.6.1998 | 24 h Le Mans | 73 | #WP0ZZZ99ZTS393076 | Seiler / Kitchak / Zadra | Konrad Motorsport | DNF |
| 14.6.1998 | FFSA GT Charade | 2 | #WP0ZZZ99ZWS393002 | Jarier / Lafon | Sonauto-Levallois | 3rd/1st |
| 14.6.1998 | FFSA GT Charade | 7 | #WP0ZZZ99ZWS393010 | Malcher / Yver | Larbre Compétition | 2nd/2nd |
| 14.6.1998 | British GT Snetterton | 33 | #WP0ZZZ99ZWS393003 | Saunders / Saunders | Gaumont/Parr Motorsport | 8th |
| 14.6.1998 | British GT Snetterton | 40 | #WP0ZZZ99ZTS394067 | Day / Pickup | P K Sport | 7th |
| 14.6.1998 | British GT Snetterton | 50 | #WP0ZZZ99ZWS393004 | Morrison / Lister | Blue Coral/Slick 50/Quaker State | 6th |
| 28.6.1998 | 1 h 45 min Minneapolis | 04 | #WP0ZZZ99ZWS393001 | Morton / Graham / Huisman | C.J. Motorsports | DNA |
| 28.6.1998 | 500 km Hockenheim | 56 | | Ortelli / Hürtgen | Roock Racing | 12th |
| 28.6.1998 | 500 km Hockenheim | 60 | #WP0ZZZ99ZWS393011? | Neugarten / Ruch / Spinelli | Elf Haberthur Racing | 13th |
| 28.6.1998 | 500 km Hockenheim | 61 | | Velay / Graham / Smadja | Elf Haberthur Racing | 17th |
| 28.6.1998 | 500 km Hockenheim | 65 | | Seiler / Stretton | Konrad Motorsport | 15th |
| 28.6.1998 | 500 km Hockenheim | 76 | #WP0ZZZ99ZTS393107 | Marchner / Palmberger / Mastropietro | Seikel Motorsport | 21st |
| 11.7.1998 | FFSA GT Dijon | 2 | #WP0ZZZ99ZWS393002 | Jarier / Lafon | Sonauto-Levallois | 1st/2nd |
| 11.7.1998 | FFSA GT Dijon | 7 | #WP0ZZZ99ZWS393010 | Malcher / Yver | Larbre Compétition | DNF/4th |
| 11.7.1998 | FFSA GT Dijon | 14 | #WP0ZZZ99ZTS393107 | Schwach / Rosterg | Seikel Motorsport | 4th/6th |
| 12.7.1998 | British GT Silverstone | 33 | #WP0ZZZ99ZWS393003 | Saunders / Saunders | Gaumont Motorsport | DNF |
| 12.7.1998 | British GT Silverstone | 35 | #WP0ZZZ99ZTS393078? | Lockie / Barrett | G-Force Motorsport Ltd. | 14th |
| 12.7.1998 | British GT Silverstone | 40 | #WP0ZZZ99ZTS394067 | Stephen Day | PK Sport | 11th |
| 12.7.1998 | British GT Silverstone | 50 | #WP0ZZZ99ZWS393004 | Morrison / Lister | Blue Coral/Slick 50 Racing | 10th |
| 12.7.1998 | 500 km Dijon | 56 | | Hürtgen / Collard | Roock Racing | 16th |
| 12.7.1998 | 500 km Dijon | 60 | #WP0ZZZ99ZWS393011? | Neugarten / Ruch / Spinelli | Elf Haberthur Racing | 24th |
| 12.7.1998 | 500 km Dijon | 61 | | Graham / Poulain / Smadja | Elf Haberthur Racing | 22nd |
| 12.7.1998 | 500 km Dijon | 65 | | Stretton / Seiler | Konrad Motorsport | 26th |
| 12.7.1998 | 500 km Dijon | 76 | #WP0ZZZ99ZTS393107 | Schwach / Seikel / Rosterg | Seikel Motorsport | DNF |
| 12.7.1998 | 500 km Dijon | 77 | #WP0ZZZ99ZWS393002 | Jarier / Lafon | Sonauto Levallois | 12th |
| 12.7.1998 | 500 km Dijon | | #WP0ZZZ99ZTS394075 | | Estoril Racing Team | DNA |
| 19.7.1998 | 4 h Nürburgring | 27 | #WP0ZZZ99ZTS393095 | Jarier / Lagniez / Lafon | Sonauto Levallois | DNA |
| 19.7.1998 | 4 h Nürburgring | 28 | #WP0ZZZ99ZTS393107 | Smith / Palmberger / Quargentan | Seikel Motorsport | DNA |
| 19.7.1998 | 4 h Nürburgring | 29 | #WP0ZZZ99ZTS394075 | Monteiro / Monteiro | Estoril Racing | DNA |
| 19.7.1998 | 4 h Nürburgring | 37 | #WP0ZZZ99ZTS393082 | Buttiero / Mastropietro / Sangiuolo | RWS Brun Motorsport | DNF |
| 19.7.1998 | 500 km Hungaroring | 56 | | Ortelli / Hürtgen | Roock Racing | DNF |
| 19.7.1998 | 500 km Hungaroring | 60 | #WP0ZZZ99ZWS393011? | Neugarten / Ruch / Spinelli | Elf Haberthur Racing | 9th |
| 19.7.1998 | 500 km Hungaroring | 61 | | Faehler / Jodexnis / Casadei | Elf Haberthur Racing | DNF |
| 19.7.1998 | 500 km Hungaroring | 65 | | Stretton / Seiler | Konrad Motorsport | DNF |
| 19.7.1998 | 500 km Hungaroring | 76 | #WP0ZZZ99ZTS393107 | Smith / Palmberger / Nearn | Seikel Motorsport | 12th |
| 26.7.1998 | 4 h Spa | 27 | #WP0ZZZ99ZTS393095 | Jarier / Lagniez / Lafon | Sonauto Levallois | DNA |
| 26.7.1998 | 4 h Spa | 28 | #WP0ZZZ99ZTS393107 | Smith / Véroux / Marchner | Seikel Motorsport | DNF |
| 26.7.1998 | 4 h Spa | 29 | #WP0ZZZ99ZTS394075 | Monteiro / Monteiro | Estoril Racing | DNF |
| 26.7.1998 | 4 h Spa | 37 | #WP0ZZZ99ZTS393082 | Sangiuolo / Buttiero / Mastropietro | RWS | DNF |
| 2.8.1998 | British GT Donington | 33 | #WP0ZZZ99ZWS393003 | Saunders / Saunders | Gaumont/Parr Motorsport | 13th |
| 2.8.1998 | British GT Donington | 35 | #WP0ZZZ99ZTS393078? | Barrett / Lockie | G-Force Motorsport | 11th |
| 2.8.1998 | British GT Donington | 40 | #WP0ZZZ99ZTS394067 | Day / Guglielmi | P K Sport | 12th |
| 2.8.1998 | British GT Donington | 50 | #WP0ZZZ99ZWS393004 | Morrison / Lister | Blue Coral/Slick 50/Quaker State | 8th |
| 9.8.1998 | 2 h 45 min Mosport | 04 | #WP0ZZZ99ZWS393001 | Morton / Graham | CJ Motorsport | 13th |
| 23.8.1998 | British GT Silverstone | 33 | #WP0ZZZ99ZWS393003 | Saunders / Saunders | Gaumont/Parr Motorsport | DNF |
| 23.8.1998 | British GT Silverstone | 35 | #WP0ZZZ99ZTS393078? | Barrett / Lockie | G-Force Motorsport | 7th |
| 23.8.1998 | British GT Silverstone | 40 | #WP0ZZZ99ZTS394067 | Day / Jordan | P K Sport | 4th |
| 23.8.1998 | British GT Silverstone | 50 | #WP0ZZZ99ZWS393004 | Morrison / Lister | Blue Coral/Slick 50/Quaker State | DNS |
| 23.8.1998 | 1000 km Suzuka | 56 | | Lammers / Hürtgen / Hezemans | Roock Racing | 15th |
| 23.8.1998 | 1000 km Suzuka | 60 | #WP0ZZZ99ZWS393011? | Neugarten / Ruch / Ligonnet | Elf Haberthur Racing | 13th |
| 23.8.1998 | 1000 km Suzuka | 61 | | Graham / Smadja / Kimoto | Elf Haberthur Racing | 19th |
| 23.8.1998 | 1000 km Suzuka | 65 | | Stretton / Hane / Harada | Konrad Motorsport | DNF |
| 23.8.1998 | 1000 km Suzuka | 76 | #WP0ZZZ99ZTS393107 | Smith / Suzuki | Seikel Motorsport | 16th |
| 6.9.1998 | 500 km Donington | 56 | | Ortelli / Hürtgen | Roock Racing | 21st |
| 6.9.1998 | 500 km Donington | 60 | #WP0ZZZ99ZWS393011? | Neugarten / Ruch / Spinelli | Elf Haberthur Racing | DNF |
| 6.9.1998 | 500 km Donington | 61 | | Graham / Smadja / Clérico | Elf Haberthur Racing | 19th |
| 6.9.1998 | 500 km Donington | 65 | | Stretton / Seiler | Konrad Motorsport | 13th |
| 6.9.1998 | 500 km Donington | 76 | #WP0ZZZ99ZTS393107 | Smith / Véroux / Cohen-Olivar | Seikel Motorsport | DNF |
| 20.9.1998 | FFSA GT Le Mans | 2 | #WP0ZZZ99ZWS393002 | Lafon / Jarier | Sonauto | 34th/- |
| 20.9.1998 | FFSA GT Le Mans | 7 | #WP0ZZZ99ZWS393010 | Chéreau / Malcher | Larbre Compétition | 2nd/2nd |
| 20.9.1998 | FFSA GT Le Mans | 21 | #WP0ZZZ99ZTS393095 | Simmenauer / Brisset | Simmenauer | -/10th |
| 20.9.1998 | FFSA GT Le Mans | 23 | #WP0ZZZ99ZTS394075 | Monteiro / Monteiro | Estoril Racing Team | 4th/3rd |
| 20.9.1998 | 500 km A1-Ring | 56 | | Hürtgen / Ortelli | Roock Racing | 22nd |
| 20.9.1998 | 500 km A1-Ring | 60 | #WP0ZZZ99ZWS393011? | Neugarten / Ruch / Spinelli | Elf Haberthur Racing | 16th |
| 20.9.1998 | 500 km A1-Ring | 61 | | Lambert / Casadei / Baron | Elf Haberthur Racing | 19th |
| 20.9.1998 | 500 km A1-Ring | 65 | | Stretton / Seiler | Konrad Motorsport | 15th |
| 20.9.1998 | 500 km A1-Ring | 76 | #WP0ZZZ99ZTS393107 | Palmberger / Jurasz / Marchner | Seikel Motorsport | DNF |
| 20.9.1998 | 500 km A1-Ring | 79 | #WP0ZZZ99ZTS393082 | Sangiuolo / Blieninger / Hofer | RWS | 18th |
| 27.9.1998 | British GT Spa | 33 | #WP0ZZZ99ZWS393003 | Saunders / Nearn | Gaumont/Parr Motorsport | DNF |
| 27.9.1998 | British GT Spa | 35 | #WP0ZZZ99ZTS393078? | Barrett / Lockie | G-Force Motorsport | 10th |
| 27.9.1998 | British GT Spa | 40 | #WP0ZZZ99ZTS394067 | Day / Jordan | P K Sport | DNF |
| 27.9.1998 | British GT Spa | 50 | #WP0ZZZ99ZWS393004 | Lister / Wallinder | Blue Coral/Slick 50/Quaker State | 8th |
| 4.10.1998 | British GT Silverstone | 33 | #WP0ZZZ99ZWS393003 | Saunders / Saunders | Gaumont/Parr Motorsport | 9th |
| 4.10.1998 | British GT Silverstone | 35 | #WP0ZZZ99ZTS393078? | Barrett / Lockie | G-Force Motorsport | DNF |
| 4.10.1998 | British GT Silverstone | 40 | #WP0ZZZ99ZTS394067 | Day / Guglielmi | P K Sport | DNA |
| 4.10.1998 | British GT Silverstone | 50 | #WP0ZZZ99ZWS393004 | Morrison / Lister | Blue Coral/Slick 50/Quaker State | DNF |
| 10.10.1998 | Petit Le Mans | 04 | #WP0ZZZ99ZWS393001 | Morton / Fellows / Graham | CJ Motorsport | 13th |
| 10.10.1998 | Petit Le Mans | 72 | | Konrad / Lammers | Konrad Motorsport | 11th |
| 18.10.1998 | 500 km Homestead | 56 | | Ortelli / Hürtgen | Roock Racing | 9th |
| 18.10.1998 | 500 km Homestead | 60 | #WP0ZZZ99ZWS393011? | Neugarten / Ruch / Brown | Elf Haberthur Racing | DNF |
| 18.10.1998 | 500 km Homestead | 61 | | Horn / Casadei | Elf Haberthur Racing | 16th |