| 22.3.1998 | 4 h Jarama | 5 | #WP0ZZZ99ZTS394064 | Saldaña / de Orleans | Kremer Racing | 6th |
| 22.3.1998 | 4 h Jarama | 32 | | Pagotto / Giribaldi | GT Racing Team | DNA |
| 22.3.1998 | 4 h Jarama | 33 | #0460003 | Kumpen / Cohen / Margueron | PK Racing | 4th |
| 22.3.1998 | 4 h Jarama | 34 | | Pareja / Chéreau / Leconte | Chereau Sports | 3rd |
| 22.3.1998 | 4 h Jarama | 35 | #0480098 | Giacomelli / Kaufmann | Freisinger Motorsport | DNS |
| 23.3.1998 | Test Silverstone | | #WP0ZZZ99ZTS394067 | Day / Astley | PK Sport | 12th |
| 23.3.1998 | Test Silverstone | | #WP0ZZZ99ZWS393004 | Lister / Morrison | Blue Coral | 10th |
| 23.3.1998 | Test Silverstone | | | Konig / Chambers | | 15th |
| 23.3.1998 | Test Silverstone | | #WP0ZZZ99ZWS393003 | Saunders / Saunders | Parr Motorsport | 13th |
| 29.3.1998 | 1000 km Monza | 12 | | Grassi / Colombo / Muenz | Rugerro Grassi | DNF |
| 29.3.1998 | 1000 km Monza | 14 | | Frigerio / Babini / Sabatini | Massimo Frigerio | 5th |
| 29.3.1998 | 1000 km Monza | 15 | #WP0ZZZ99ZTS393107 | Smith / Palmberger / Quargentan | Seikel Motorsport | 9th |
| 29.3.1998 | 1000 km Monza | 21 | #0460016 | Mastropietro / Polli / Mastropietro | Promosport | 3rd |
| 29.3.1998 | 1000 km Monza | 22 | | Sangiuolo / Lusuardi / De Iturbe | RWS-Brun Motorsport | 4th |
| 5.4.1998 | British GT Silverstone | 33 | #WP0ZZZ99ZWS393003 | Saunders / Saunders | Gaumont/Parr Motorsport | 13th |
| 5.4.1998 | British GT Silverstone | 40 | #WP0ZZZ99ZTS394067 | Astley / Day | PK Sport | 10th |
| 5.4.1998 | British GT Silverstone | 50 | #WP0ZZZ99ZWS393004 | Morrison / Lister | Blue Coral/Slick 50/Quaker State | 9th |
| 12.4.1998 | FFSA GT Nogaro | 1 | | Goueslard / Sourd | Larbre Compétition | 1st/2nd |
| 12.4.1998 | FFSA GT Nogaro | 2 | #WP0ZZZ99ZWS393002 | Jarier / Lafon | Sonauto-Levallois | 2nd/1st |
| 12.4.1998 | FFSA GT Nogaro | 4 | | Roland Bervillé | Alméras Fréres | 6th/6th |
| 12.4.1998 | FFSA GT Nogaro | 6 | #WP0ZZZ99ZTS393103 | Nourry / Perrier | Michel Nourry | 3rd/3rd |
| 12.4.1998 | FFSA GT Nogaro | 7 | #WP0ZZZ99ZWS393010 | Yver / Chéreau | Larbre Compétition | 5th/5th |
| 12.4.1998 | 500 km Oschersleben | 56 | | Hürtgen / Ortelli | Roock Racing | DNF |
| 12.4.1998 | 500 km Oschersleben | 57 | | Eichmann / Maassen | Roock Racing | DQ |
| 12.4.1998 | 500 km Oschersleben | 58 | #98 RST 530 003 | Ahrlé / Prutirat | Roock Sportsystem | 16th |
| 12.4.1998 | 500 km Oschersleben | 60 | #WP0ZZZ99ZWS393011? | Neugarten / Ruch / Spinelli | Elf Haberthur Racing | 12th |
| 12.4.1998 | 500 km Oschersleben | 61 | | Poulain / Graham / Smadja | Elf Haberthur Racing | DNF |
| 12.4.1998 | 500 km Oschersleben | 62 | | Sick / Rohr | Stadler Motorsport | 17th |
| 12.4.1998 | 500 km Oschersleben | 63 | #WP0ZZZ99ZTS394071 | Trunk / Müller | Krauss Race Sports | 10th |
| 12.4.1998 | 500 km Oschersleben | 64 | | | Krauss Race Sports | DNA |
| 12.4.1998 | 500 km Oschersleben | 65 | | Seiler / Stretton | Konrad Motorsport | 9th |
| 12.4.1998 | 500 km Oschersleben | 66 | | Konrad / Ham | Konrad Motorsport | 8th |
| 12.4.1998 | 500 km Oschersleben | 69 | #WP0ZZZ99ZTS394065 | Ried / Vuillaume | Proton Competition | 19th |
| 12.4.1998 | 500 km Oschersleben | 96 | | Felbermayr / Felbermayr, Jr. | Proton Competition | 18th |
| 26.4.1998 | 4 h Paul Ricard | 8 | | Bert Ploeg | Bert Ploeg | DNA |
| 26.4.1998 | 4 h Paul Ricard | 9 | #WP0ZZZ99ZTS394069 | Lister / Williams / Beaverbroock | BVB Motorsport | 1st |
| 26.4.1998 | 4 h Paul Ricard | 26 | | Gay / Cohen-Olivar / Ameur | Swiss Team Salamin | DNA |
| 26.4.1998 | 4 h Paul Ricard | 27 | #WP0ZZZ99ZTS393095? | Jarier / Bacle / Lafon | Sonauto Levallois | DNF |
| 26.4.1998 | 4 h Paul Ricard | 28 | #WP0ZZZ99ZTS393107 | Smith / Véroux | Seikel Motorsport | 3rd |
| 26.4.1998 | 4 h Paul Ricard | 29 | #WP0ZZZ99ZTS394075 | Monteiro / Monteiro / Maisonneuve | Estoril Racing Team | 2nd |
| 26.4.1998 | 4 h Paul Ricard | 32 | | Pagotto / Giribaldi / Drudi | Luigino Pagotto | DNA |
| 26.4.1998 | 4 h Paul Ricard | 33 | #0460003 | Margueron / Cohen / Kumpen | GLPK Racing | DNF |
| 26.4.1998 | 4 h Paul Ricard | 35 | #0480098 | Ligonnet / Castel | Freisinger Motorsport | 4th |
| 26.4.1998 | 4 h Paul Ricard | 37 | #WP0ZZZ99ZTS393082 | Sangiuolo / Mastropietro / Buttiero | RWS | DNF |
| 26.4.1998 | 4 h Paul Ricard | 41 | | | Freisinger Motorsport | DNA |
| 26.4.1998 | 4 h Paul Ricard | 42 | | Angelo Zadra | Autosport Racing | DNA |
| 26.4.1998 | 4 h Paul Ricard | 43 | | Frigerio / Sabatini | Massimo Frigerio | DNS |
| 26.4.1998 | 4 h Paul Ricard | 44 | | Ried / Vuillaume | Proton Competition | 7th |
| 26.4.1998 | 3 h 45 min Las Vegas | 66 | | Ham / Konrad | Konrad Motorsport | DNA |
| 26.4.1998 | 4 h Paul Ricard | 79 | | | Pilotage Passion | DNA |
| 26.4.1998 | 3 h 45 min Las Vegas | 99 | #WP0ZZZ99ZTS393104 | Schumacher / Snow | Schumacher Racing | 11th |
| 2.5.1998 | All Japan GT Fuji | 10 | | Asou / Ishikawa | Ability | NC |
| 2.5.1998 | All Japan GT Fuji | 30 | | Yamada / Okada | Team Take One | NC |
| 2.5.1998 | All Japan GT Fuji | 70 | | Ishibashi / van Schoote | Team Gaikokuya | NC |
| 2.5.1998 | All Japan GT Fuji | 71 | | Hoshino / Jounai | Sigmatech Racing Team | NC |
| 3.5.1998 | Prequalifying Le Mans | 60 | | Chéreau / Yver | Chereau Sports | DNA |
| 3.5.1998 | Prequalifying Le Mans | 61 | #WP0ZZZ99ZTS394071 | Müller / Trunk / Palmberger | Krauss Race Sports International | 50th |
| 3.5.1998 | Prequalifying Le Mans | 62 | #WP0ZZZ99ZWS393001 | Morton / Grohs / Graham | C.J. Motorsport | 47th |
| 3.5.1998 | Prequalifying Le Mans | 63 | | Thomas Erdos | Gerard MacQuillan | 57th |
| 3.5.1998 | Prequalifying Le Mans | 64 | #0480039 | Eichmann / Hürtgen | Roock Racing International | 41st |
| 3.5.1998 | Prequalifying Le Mans | 65 | #0480040 | Pilgrim / Ahrlé | Roock Racing International | 54th |
| 3.5.1998 | Prequalifying Le Mans | 66 | | Sascha Maassen | Roock Racing International | 59th |
| 3.5.1998 | Prequalifying Le Mans | 67 | #WP0ZZZ99ZWS393011 | Neugarten / Smadja | Elf-Haberthur Racing | 45th |
| 3.5.1998 | Prequalifying Le Mans | 68 | #WP0ZZZ99ZTS393085 | Graham / Poulain / Maury-Laribiére / Smadja | Elf-Haberthur Racing | 56th |
| 3.5.1998 | Prequalifying Le Mans | 69 | #WP0ZZZ99ZTS393103 | Nourry / Perrier / Quiniou | Michel Nourry | 53rd |
| 3.5.1998 | Prequalifying Le Mans | 70 | #WP0ZZZ99ZTS394066 | Ham / Schumacher | Konrad Motorsport | 42nd |
| 3.5.1998 | Prequalifying Le Mans | 71 | #WP0ZZZ99ZTS394075 | Monteiro / Monteiro / Maisonneuve | Estoril Racing Communication | 48th |
| 3.5.1998 | Prequalifying Le Mans | 72 | #WP0ZZZ99ZWS393010 | Goueslard / Chéreau / Bourdais | Larbre Competition | 40th |
| 3.5.1998 | Prequalifying Le Mans | 73 | #WP0ZZZ99ZTS393076 | Seiler / Kitchak / Zadra | Konrad Motorsport | 44th |
| 3.5.1998 | Belcar Spa SFD | 86 | | Bouvy / Defourny | | 35th |
| 4.5.1998 | British GT Oulton Park | 33 | #WP0ZZZ99ZWS393003 | Saunders / Saunders | Gaumont/Parr Motorsport | 11th |
| 4.5.1998 | British GT Oulton Park | 40 | #WP0ZZZ99ZTS394067 | Day / Chambers | P K Sport | 8th |
| 4.5.1998 | British GT Oulton Park | 50 | #WP0ZZZ99ZWS393004 | Morrison / Lister | Blue Coral/Slick 50/Quaker State | 10th |
| 10.5.1998 | FFSA GT Spa | 1 | | Goueslard / Sourd | Larbre Compétition | 3rd/2nd |
| 10.5.1998 | FFSA GT Spa | 2 | #WP0ZZZ99ZWS393002 | Jarier / Lafon | Sonauto | 1st/1st |
| 10.5.1998 | FFSA GT Spa | 4 | | Roland Bervillé | Almeras Freres | DNA |
| 10.5.1998 | FFSA GT Spa | 6 | #WP0ZZZ99ZTS393103 | Nourry / Perrier | Michel Nourry | DNA |
| 10.5.1998 | FFSA GT Spa | 7 | #WP0ZZZ99ZWS393010 | Malcher / Yver | Larbre Compétition | 2nd/3rd |
| 10.5.1998 | SM GTR Mantorp Park | 7 | | Bo Jonasson | Bosse Jonasson | 1st/3rd |
| 10.5.1998 | FFSA GT Spa | 8 | | Gérard Dillmann | Swiss Team Salamin | DNA |
| 10.5.1998 | FFSA GT Spa | 10 | | Martin / Hürtgen | Michael Martin | DNS/DNF |
| 10.5.1998 | FFSA GT Spa | 11 | | Eschmann / Hulverscheid | Eschmann | 4th/4th |
| 10.5.1998 | FFSA GT Spa | 14 | | Schwach / Ligonnet | Seikel Motorsport | 6th/5th |
| 10.5.1998 | FFSA GT Spa | 15 | | Otto Altenbach | Obermaier | DNS/DNF |
| 10.5.1998 | FFSA GT Spa | 16 | | Josef Kalder | | 21st/DNS |
| 10.5.1998 | CDN GT Mosport BARC Spring | 91 | #WP0ZZZ99ZTS394062 | Harry Bytzek | | 5th |
| 17.5.1998 | 2 h 15 min Homestead | 04 | #WP0ZZZ99ZWS393001 | Morton / Graham / Huisman | C.J. Motorsports | DNA |
| 17.5.1998 | 2 h 15 min Homestead | 07 | | Marshall / Marshall | G & W Motorsports | 16th |
| 17.5.1998 | 500 km Silverstone | 56 | | Hürtgen / Ortelli | Roock Racing | DNF |
| 17.5.1998 | 500 km Silverstone | 57 | | Eichmann / Maassen | Roock Racing | DNF |
| 17.5.1998 | 500 km Silverstone | 58 | #98 RST 530 003 | Sugden / Owen / Ahrlé | Roock Sportsystem | 18th |
| 17.5.1998 | 500 km Silverstone | 60 | #WP0ZZZ99ZWS393011? | Neugarten / Ruch / Spinelli | Elf Haberthur Racing | 10th |
| 17.5.1998 | 500 km Silverstone | 61 | | Graham / Velay / Smadja / Neugarten / Ruch | Elf Haberthur Racing | DNA |
| 17.5.1998 | 500 km Silverstone | 62 | | Sick / Rohr | Stadler Motorsport | 11th |
| 17.5.1998 | 500 km Silverstone | 63 | #WP0ZZZ99ZTS394071 | Trunk / Müller | Krauss Race Sports International | 16th |
| 17.5.1998 | 500 km Silverstone | 65 | | Seiler / Stretton | Konrad Motorsport | 17th |
| 17.5.1998 | 500 km Silverstone | 66 | | Konrad / Ham | Konrad Motorsport | 15th |
| 17.5.1998 | 2 h 15 min Homestead | 69 | #WP0ZZZ99ZTS394065 | Lay / Langhorne | Proton Competition | DNA |
| 17.5.1998 | 2 h 15 min Homestead | 98 | | Ham / Konrad | Konrad Motorsport | DNA |
| 17.5.1998 | 2 h 15 min Homestead | 99 | #WP0ZZZ99ZTS393104 | Schumacher / O'Steen | Schumacher Racing | DNA |