 | Oldsmobile 442 W-30 Convertible (1969) | Mr.choppers | CC BY-SA 3.0 | Original |
 | Oldsmobile Cutlass Ciera convertible (Hess & Eisenhardt) | Mr.choppers | CC BY-SA 3.0 | Original |
 | Oldsmobile Cutlass Ciera convertible (Hess & Eisenhardt) | Mr.choppers | CC BY-SA 3.0 | Original |
 | Oldsmobile Cutlass W-31 (1969) | Greg Gjerdingen from Willmar, USA | CC BY 2.0 | Original |
 | Oldsmobile Cutlass W-31 (1969) | Greg Gjerdingen from Willmar, USA | CC BY 2.0 | Original |
 | Oldsmobile Cutlass W-31 (1969) | Greg Gjerdingen from Willmar, USA | CC BY 2.0 | Original |
 | Oldsmobile Hurst/Olds (1969) | 1969ho at English Wikipedia | CC BY-SA 3.0 | Original |
 | Oldsmobile Hurst/Olds (1972) | 1969ho at English Wikipedia | CC BY-SA 3.0 | Original |
 | Oldsmobile Hurst/Olds 15th Anniversary (1983) | dave_7 from Lethbridge, Canada | CC BY 2.0 | Original |
 | Oldsmobile Hurst/Olds 15th Anniversary (1983) | dave_7 from Lethbridge, Canada | CC BY 2.0 | Original |
 | Oldsmobile Light Eight (1916-1923) | Mr.choppers | CC BY-SA 3.0 | Original |
 | Oldsmobile Light Eight (1916-1923) | Greg Gjerdingen from Willmar, USA | CC BY 2.0 | Original |
 | Oldsmobile Ninety-Eight Fiesta | Joe deSousa | CC0 1.0 | Original |
 | Oldsmobile Rallye 350 (W-45) (1970) | Dave Parker from Tracy, CA, USA,cropped and altered by uploader Mr.choppers | CC BY 2.0 | Original |
 | Oldsmobile Rallye 350 (W-45) (1970) | Greg Gjerdingen from Willmar, USA | CC BY 2.0 | Original |
 | Oldsmobile Rallye 350 (W-45) (1970) | Greg Gjerdingen from Willmar, USA | CC BY 2.0 | Original |
 | OM 665 Superba 'Mille Miglia' | This Photo was taken by Wolfgang Moroder. Feel free to use my photos, but please mention me as the author and send me a message. This image is not in the public domain. Please respect the copyright pr | CC BY-SA 3.0 | Original |
 | OM 665 Superba 'Mille Miglia' | This Photo was taken by Wolfgang Moroder. Feel free to use my photos, but please mention me as the author and send me a message. This image is not in the public domain. Please respect the copyright pr | CC BY-SA 3.0 | Original |
 | OM 665 Superba 'Mille Miglia' | This Photo was taken by Wolfgang Moroder. Feel free to use my photos, but please mention me as the author and send me a message. This image is not in the public domain. Please respect the copyright pr | CC BY-SA 3.0 | Original |
 | Opel 1.0 Liter (1931-1933) | Lothar Spurzem | CC BY-SA 2.0 | Original |
 | Opel 1.0 Liter (1931-1933) | Lothar Spurzem | CC BY-SA 2.0 | Original |
 | Opel Admiral (1937-1939) | Lothar Spurzem | CC BY-SA 2.0 | Original |
 | Opel Admiral (1937-1939) | Lothar Spurzem | CC BY-SA 2.0 | Original |
 | Opel Admiral A V8 (1964-1965) | Triple-green | CC BY-SA 2.0 | Original |
 | Opel Ascona 400 | Gryffindor | Public domain | Original |
 | Opel Ascona 400 | Calreyn88 | CC BY-SA 4.0 | Original |
 | Opel Ascona 400 | Steffs88 | CC BY-SA 4.0 | Original |
 | Opel Ascona C Cabriolet (Keinath C3) (1980s) | Cjp24 | CC BY-SA 4.0 | Original |
 | Opel Ascona C Cabriolet (Keinath C3) (1980s) | Charles01 | CC BY-SA 4.0 | Original |
 | Opel Ascona C Cabriolet (Keinath C3) (1980s) | Charles01 | CC BY-SA 4.0 | Original |
 | Opel Astra H Nürburgring Edition (2005-2006) | Thomas doerfer | CC BY-SA 3.0 | Original |
 | Opel Astra H Nürburgring Edition (2005-2006) | Thomas doerfer | CC BY-SA 3.0 | Original |
 | Opel Commodore A GS/E | Vauxford | CC BY-SA 4.0 | Original |
 | Opel Diplomat V8 Coupé (Karmann) | nakhon100 | CC BY 2.0 | Original |
 | Opel Diplomat V8 Coupé (Karmann) | Detectandpreserve | CC BY-SA 3.0 | Original |
 | Opel Diplomat V8 Coupé (Karmann) | Triple-green | CC BY-SA 2.0 | Original |
 | Opel GT Aero | Alexander-93 | CC BY-SA 4.0 | Original |
 | Opel GT Aero | Torana | CC BY-SA 3.0 | Original |
 | Opel GT Aero | Torana | CC BY-SA 3.0 | Original |
 | Opel GT Roadster (2007) (2007-2009) | M 93 | CC BY-SA 3.0 | Original |
 | Opel Kadett A "Oliver" (Top Gear Botswana Special car) | John K | CC BY-SA 4.0 | Original |
 | Opel Kadett C Aero (Baur) | Berthold Werner | CC BY-SA 3.0 | Original |
 | Opel Kadett C Aero (Baur) | Berthold Werner | CC BY-SA 3.0 | Original |
 | Opel Kadett C Aero (Baur) | Berthold Werner | CC BY-SA 3.0 | Original |
 | Opel Kadett C Aero (Baur) | rossingen | CC0 1.0 | Original |
 | Opel Kadett C GT/E | OlliFoolish | CC BY-SA 3.0 | Original |
 | Opel Manta 400 | Thesupermat | CC BY-SA 4.0 | Original |
 | Opel Manta 400 | Thesupermat | CC BY-SA 4.0 | Original |
 | Opel Manta 400 | Tsungam | CC BY-SA 4.0 | Original |
 | Opel Manta A GT/E | Het Meder | CC BY-SA 4.0 | Original |
 | Opel Manta TE2800 (Steinmetz) | Minzoblate | CC BY-SA 4.0 | Original |
 | Opel Manta TE2800 (Steinmetz) | SG2012 | CC BY 2.0 | Original |
 | Opel Omega Evolution 500 | Lukeno94 | CC BY-SA 3.0 | Original |
 | Opel RAK 2 rocket car | 2NMR | CC BY-SA 4.0 | Original |
 | Opel Regent | Lars-Göran Lindgren Sweden | CC BY-SA 3.0 | Original |
 | Opel Regent | Lars-Göran Lindgren Sweden | CC BY-SA 3.0 | Original |
 | Opel Slalom | Gildos | Public domain | Original |
 | Opel Slalom | Gildos | Public domain | Original |
 | Opel Speedster | Unknown author | Public domain | Original |
 | Optimal Energy Joule (2012) | Rutger van der Maar | CC BY 2.0 | Original |
 | Optimal Energy Joule (2012) | Rutger van der Maar | CC BY 2.0 | Original |
 | Optimal Energy Joule (2012) | Rutger van der Maar | CC BY 2.0 | Original |
 | Ora Good Cat Ultra (2025) | Chanokchon | CC BY-SA 4.0 | Original |
 | OSCA MT4 1100 | Michael Gaylard from Horsham, UK | CC BY 2.0 | Original |
 | OSCA MT4 1100 | Unknown photographer | Public domain | Original |