| 5.6.1988 | Nordic SS Ahvenisto | 5 | Escort | Matti Kangasaho | Matti Kangasaho | DNA |
| 5.6.1988 | Nordic SS Ahvenisto | 26 | Capri RS | Thomas Stenlund | Thomas Stenlund | DNS |
| 19.6.1988 | 24 h Nürburgring | 1 | Sierra Cosworth | Ludwig / Biela / Soper | Ford Texaco Eggenberger Racing Team | DNF |
| 19.6.1988 | 24 h Nürburgring | 2 | Sierra Cosworth | Brancatelli / Dieudonné / Soper | Ford Texaco Eggenberger Racing Team | DNF |
| 19.6.1988 | Trans-Am Detroit | 29 | Mustang | Ed Hinchliff | Chassis Research | 23rd |
| 19.6.1988 | Trans-Am Detroit | 47 | Thunderbird | Danny May | Jimmy'z Sportswear | 8th |
| 19.6.1988 | Trans-Am Detroit | 50 | Mustang | Bruce Nesbitt | Teflon | 7th |
| 19.6.1988 | 24 h Nürburgring | 64 | Capri 3.0 | Döring / Gartmann / Brinkmann | Kamei Crew | DNF |
| 19.6.1988 | 24 h Nürburgring | 69 | Escort RS 2000 | Mallwitz / Brooks / Trommer | Ford Kuhn Motorsport Renngemeinschaft Krefeld | 107th |
| 19.6.1988 | 24 h Nürburgring | 71 | Escort | Kummle / Utsch / Schall | | 46th |
| 19.6.1988 | 24 h Nürburgring | 76 | Escort RS 2000 | Kreim / Muntermann / Müller | | DNF |
| 19.6.1988 | 24 h Nürburgring | 80 | Escort RS 2000 | Nüchter / Jeleniowski / Zanetti | Scuderia Augustusburg Brühl e. V. im ADAC | 84th |
| 19.6.1988 | 24 h Nürburgring | 83 | Escort RS 2000 | Scheer / Zeitschner / Boemann | | DNF |
| 19.6.1988 | 24 h Nürburgring | 84 | Escort RS 2000 | Schmitz / Lingen / Baumann | Sportfahrergemeinschaft Köln e. V. im ADAC | 95th |
| 19.6.1988 | Trans-Am Detroit | 92 | Mustang | Phillip Bartelt | Bartelt Racing | 20th |
| 19.6.1988 | 24 h Nürburgring | 99 | Fiesta | Gerlings / Schestak / Schulze-Ardey | Auto Center RS Hoffarth | 51st |
| 19.6.1988 | 24 h Nürburgring | 138 | Sierra Cosworth | Paul / Wester / Witzel | Ford Pohl RS-Center | 17th |
| 19.6.1988 | 24 h Nürburgring | 140 | Sierra | Berti / Maier / Weigel | | 103rd |
| 19.6.1988 | 24 h Nürburgring | 141 | Sierra Cosworth | Klink / Palmato / Giudici | Ford Mohag Motorsport | DNF |
| 19.6.1988 | 24 h Nürburgring | 142 | Sierra Cosworth | Schönstein / Urbinger / Schlesack | ACBL Remscheid e. V. | DNF |
| 19.6.1988 | 24 h Nürburgring | 144 | Sierra Cosworth | Frieske / Hufstadt / Sander | Original ATE Bremsen | 79th |
| 19.6.1988 | 24 h Nürburgring | 145 | Sierra Cosworth | Kather / Schlesack / Hahn | Krafft Walzen Team | 88th |
| 19.6.1988 | 24 h Nürburgring | 148 | Sierra Cosworth | Briel / Buhk / von Saurma-Jeltsch | Team Sonax Autopflege | DNF |
| 19.6.1988 | 24 h Nürburgring | 206 | Sierra Cosworth | Hermanns / Roser / Hufstadt | Original ATE Bremsen | 69th |
| 19.6.1988 | 24 h Nürburgring | 209 | Sierra 4x4 | Loosen / Scheffler / Knoche | MSC Hennef | 28th |
| 19.6.1988 | 24 h Nürburgring | 214 | Escort Turbo | Ehlebracht / Mönnekes / Weiß | | 50th |
| 19.6.1988 | 24 h Nürburgring | 219 | Escort RS 2000 | Ossino / Plotkowiak / Gastes | Ford Kuhn Motorsport Renngemeinschaft Krefeld | 74th |
| 19.6.1988 | 24 h Nürburgring | 223 | Escort RS 2000 | Mallwitz / Jaerchow / Jaerchow | Ford Kuhn Motorsport Renngemeinschaft Krefeld | 104th |
| 19.6.1988 | 24 h Nürburgring | 260 | Escort | Bamberger / Fisseler / Kirsch | Best Motorsport | DNF |
| 19.6.1988 | SM Dijon | | Escort | Adolf Gärtner | | ?th |
| 26.6.1988 | Trans-Am Niagara Falls | 29 | Mustang | Ed Hinchliff | Chassis Research | DNA |
| 26.6.1988 | Trans-Am Niagara Falls | 47 | Thunderbird | Danny May | Jimmy'z Sportswear | 25th |
| 26.6.1988 | Trans-Am Niagara Falls | 50 | Mustang | Bruce Nesbitt | Teflon | 9th |
| 26.6.1988 | Trans-Am Niagara Falls | 74 | Mustang | Casey Mollett | Mollett Racing | DNA |
| 26.6.1988 | Trans-Am Niagara Falls | 92 | Mustang | Phillip Bartelt | Bartelt Racing | DNA |
| 2.7.1988 | Trans-Am Cleveland | 29 | Mustang | Ed Hinchliff | Chassis Research | DNS |
| 2.7.1988 | Trans-Am Cleveland | 47 | Thunderbird | Danny May | Jimmy'z Sportswear | 36th |
| 2.7.1988 | Trans-Am Cleveland | 50 | Mustang | Bruce Nesbitt | Teflon | 24th |
| 2.7.1988 | Trans-Am Cleveland | 92 | Mustang | Phillip Bartelt | Bartelt Racing | 26th |
| 3.7.1988 | 500 km Watkins Glen | 6 | Mustang Probe | Francia / Halsmer / Pumpelly | Tom Milner Racing | 17th |
| 3.7.1988 | 500 km Watkins Glen | 7 | Mustang Probe | Tom Pumpelly | Tom Milner Racing | 24th |
| 3.7.1988 | SM Hockenheim | | Escort | Adolf Gärtner | | ?th |
| 10.7.1988 | 500 km Nürburgring | 1 | Sierra RS 500 | Ludwig / Soper | Ford Texaco Eggenberger | 1st |
| 10.7.1988 | 500 km Nürburgring | 2 | Sierra RS 500 | Brancatelli / Dieudonné | Ford Texaco Eggenberger | 2nd |
| 10.7.1988 | 500 km Nürburgring | 3 | Sierra RS 500 | Frank Biela | Ford Texaco Eggenberger | DNA |
| 10.7.1988 | 500 km Nürburgring | 4 | Sierra RS 500 | Allam / Hahne | Wolf-Racing | DNF |
| 10.7.1988 | 500 km Nürburgring | 5 | Sierra RS Cosworth | Orlandi / Castagna | Jolly Club Bergamo | DNF |
| 10.7.1988 | 500 km Nürburgring | 6 | Sierra RS Cosworth | Siena / Camathias | Jolly Club Bergamo | 8th |
| 10.7.1988 | 500 km Nürburgring | 14 | Sierra RS Cosworth | Tassin / Feitler | Euro Luigi Racing | 12th |
| 10.7.1988 | 500 km Nürburgring | 15 | Sierra RS Cosworth | Feitler / Andruet | Euro Luigi Racing | DNA |
| 10.7.1988 | 500 km Nürburgring | 17 | Sierra RS 500 | Bornebusch / Larsson | Bornebusch Racing | 11th |
| 10.7.1988 | 500 km Nürburgring | 18 | Sierra RS Cosworth | Oppitzhauser / Moczár | Oppitzhauser Kuelkker Racing Team | DNF |
| 10.7.1988 | 500 km Nürburgring | 22 | Sierra RS 500 | Shimizu / Yokoshima | Object T | 7th |
| 10.7.1988 | 500 km Nürburgring | 50 | Mustang 5.0 GT | Ruch / Ruch | | DNF |
| 17.7.1988 | Trans-Am Brainerd | 47 | Thunderbird | Danny May | Jimmy'z Sportswear | 12th |
| 17.7.1988 | Trans-Am Brainerd | 50 | Mustang | Bruce Nesbitt | Teflon | 27th |
| 17.7.1988 | Trans-Am Brainerd | 92 | Mustang | Phillip Bartelt | Bartelt Racing | 19th |
| 23.7.1988 | Trans-Am Meadowlands | 47 | Thunderbird | Danny May | Jimmy'z Sportswear | 26th |
| 23.7.1988 | Trans-Am Meadowlands | 50 | Mustang | Bruce Nesbitt | Teflon | 14th |
| 31.7.1988 | 24 h Spa | 1 | Sierra RS 500 | Dieudonné / Boutsen / Ludwig | Ford Texaco Eggenberger Racing Team | 2nd |
| 31.7.1988 | 24 h Spa | 2 | Sierra RS 500 | Brancatelli / Theys / Gachot | Ford Texaco Eggenberger Racing Team | DNF |
| 31.7.1988 | 24 h Spa | 3 | Sierra RS 500 | Schneider / Biela / Soper | Ford Texaco Eggenberger Racing Team | 4th |
| 31.7.1988 | 24 h Spa | 4 | Sierra RS 500 | Allam / Hahne | Wolf Racing | DNA |
| 31.7.1988 | 24 h Spa | 5 | Sierra RS 500 | Brand / Castagna / Vitale | Jolly Club Bergamo | DNF |
| 31.7.1988 | 24 h Spa | 6 | Sierra RS 500 | Orlandi / Toffoli / Siena | Jolly Club Bergamo | 17th |
| 31.7.1988 | 300 km Portland | 6 | Mustang Probe | Halsmer / Dobson | Tom Milner Racing | 7th |
| 31.7.1988 | 300 km Portland | 7 | Mustang Probe | Tom Pumpelly | Tom Milner Racing | 26th |
| 31.7.1988 | 24 h Spa | 14 | Sierra RS 500 | Tassin / Feitler / Andruet | Euro Luigi Racing | DNF |
| 31.7.1988 | 24 h Spa | 15 | Sierra RS 500 | Ballot-Léna / Ricci / Cremer | Euro Luigi Racing | DNF |
| 31.7.1988 | 24 h Spa | 17 | Sierra RS 500 | Bornebusch / Wolff / de Sordi | K. Bornebusch | DNF |
| 31.7.1988 | 1 h 30 min Portland [GT] | 23 | Mustang | David Huntsman | | 27th |
| 31.7.1988 | 24 h Spa | 26 | Sierra RS 500 | Sourd / Metge / Jaussaud | Bavaria Auto | DNF |
| 31.7.1988 | 24 h Spa | 27 | Sierra RS 500 | de Thoisy / de Radigues / Haezebrouck | Bavaria Auto | DNF |
| 31.7.1988 | 24 h Spa | 33 | Sierra RS 500 | Bolderheij / van Hilten / Winderickx | Bolderheij | DNF |
| 6.8.1988 | Trans-Am Lime Rock | 43 | Mustang | Mike Brummer | Niagara Paper Co. | 25th |
| 6.8.1988 | Trans-Am Lime Rock | 47 | Thunderbird | Danny May | Jimmy'z Sportswear | 23rd |
| 6.8.1988 | Trans-Am Lime Rock | 50 | Mustang | Bruce Nesbitt | Teflon | 10th |
| 6.8.1988 | Trans-Am Lime Rock | 92 | Mustang | Phillip Bartelt | Bartelt Racing | 17th |
| 7.8.1988 | Nordic SS Knutstorp | | Capri | Stefan Pettersson | | 7th |
| 7.8.1988 | Nordic SS Knutstorp | | Capri RS | Stefan Pettersson | | 6th |
| 14.8.1988 | 300 km Sears Point | 6 | Mustang Probe | Dobson / Melgrati | Tom Milner Racing | 16th |
| 14.8.1988 | 300 km Sears Point | 7 | Mustang Probe | Pumpelly / Mead | Tom Milner Racing | 26th |
| 14.8.1988 | Sears Point [GT] | 23 | Mustang | McFeely / Huntsman | - | DNS |
| 21.8.1988 | ETCC Zolder | 1 | Sierra RS 500 | Brancatelli / Soper | Ford Texaco Eggenberger Racing Team | DNF |
| 21.8.1988 | ETCC Zolder | 2 | Sierra RS 500 | Ludwig / Soper | Ford Texaco Eggenberger Racing Team | DNF |
| 21.8.1988 | ETCC Zolder | 3 | Sierra RS 500 | Dieudonné / Biela | Ford Texaco Eggenberger Racing Team | 2nd |
| 21.8.1988 | 500 km Kemora | 7 | Escort II RS Turbo | Öberg / Tiholt | Kabo Plastics Industri | 10th |
| 21.8.1988 | ETCC Zolder | 14 | Sierra RS 500 | Tassin / Andruet | Euromotor/Luigi | 3rd |
| 21.8.1988 | ETCC Zolder | 15 | Sierra RS 500 | Feitler / Cremer | Euromotor/Luigi | raced |
| 21.8.1988 | 500 km Kemora | 15 | Sierra XR4Ti | Nodes / Sarlin / Jatala | Beate Nodes | 4th |
| 21.8.1988 | ETCC Zolder | 17 | Sierra RS 500 | Larsson / de Sordi / Bornebusch | Bornebusch Racing | 7th |
| 21.8.1988 | ETCC Zolder | | Sierra RS 500 | Oberndorfer / Hahne | Wolf Racing | 5th |
| 4.9.1988 | Tourist Trophy | 18 | Sierra RS Cosworth | Oppitzhauser / Moczár | Oppitzhauser Team | DNA |
| 4.9.1988 | Tourist Trophy | 21 | Sierra RS 500 | Goode / Newman / Lyall | Listerine/Texaco Racing | 27th |
| 4.9.1988 | Tourist Trophy | 44 | Sierra RS 500 | Bristow / Gravett | Baynard Cars Ltd. | 9th |
| 4.9.1988 | Tourist Trophy | 45 | Sierra RS 500 | Brodie / Birley | Team Atari Cristal Brodie Brittain Racing | DNA |
| 4.9.1988 | Trans-Am Mid-Ohio | 47 | Thunderbird | Danny May | Jimmy'z Sportswear | 17th |
| 4.9.1988 | Tourist Trophy | 48 | Sierra RS 500 | Chris Hodgetts | Brooklyn Motorsport | DNA |
| 4.9.1988 | Trans-Am Mid-Ohio | 50 | Mustang | Bruce Nesbitt | Teflon | 7th |
| 4.9.1988 | Trans-Am Mid-Ohio | 92 | Mustang | Phillip Bartelt | Bartelt Racing | 15th |