WThe 2013 Asian Le Mans Series was the second season of the Automobile Club de l'Ouest's Asian Le Mans Series endurance auto racing championship. The series was initially launched in 2009 at the 1000 km of Okayama, but did not resume the following year. The project was reinitialized by the Automobile Club de l'Ouest (ACO) in 2012, with the Chinese S2M Group serving as the series promoter and TS Motorsport serving as organizer. It is the fourth 24 Hours of Le Mans-based series created by the ACO, following the American Le Mans Series, European Le Mans Series, and FIA World Endurance Championship. The four event season began in Inje, South Korea on 4 August and ended in Selangor, Malaysia on 8 December 2013.
WThe 2013 European Le Mans Series season was the tenth season of the Automobile Club de l'Ouest's European Le Mans Series endurance auto racing series. It is the first season of the European Le Mans Series under the control of the ACO's Le Mans Endurance Management, replacing former organisers Peter Auto. Championships are open to four categories, two of which are for Le Mans Prototypes while the other two are grand tourers. The season contested over five races starting at the Silverstone Circuit, United Kingdom on 13 April and ended at Circuit Paul Ricard, France on 28 September.
WThe 2013 GP2 Series season was the forty-seventh season of the second-tier of Formula One feeder championship and also ninth season under the GP2 Series moniker, a support series to the 2013 Formula One World Championship.
WThe 2013 IZOD IndyCar Series was the 18th season of the IndyCar Series and the 102nd season of American open wheel racing. Its premier event was the 97th Indianapolis 500 held on Sunday, May 26. The 2013 season was the second to feature the Dallara DW12 chassis. Ryan Hunter-Reay entered the season as the defending drivers' champion. Chevrolet entered as the defending Manufacturers' Cup champion.
WThe 2013 International V8 Supercars Championship was a Fédération Internationale de l'Automobile-sanctioned international motor racing series for V8 Supercars that was based in Australia. It was the fifteenth running of the V8 Supercar Championship Series and the seventeenth series in which V8 Supercars contested the premier Australian touring car title. The championship was contested over thirty-six races, starting with the Clipsal 500 Adelaide on 2 March 2013, and finishing with the Sydney 500 on 8 December. The series' calendar also expanded, travelling to the United States for the first time for a race at the Circuit of the Americas in Austin, Texas.
WThe 81st 24 Hours of Le Mans was an automobile endurance racing event for Le Mans Prototype and Le Mans Grand Touring Endurance cars held from 19 to 23 June 2013 at the Circuit de la Sarthe at Le Mans, France. It was the 81st running of the event, as organised by the Automobile Club de l'Ouest (ACO) since 1923. The race was the third and the premier round of the 2013 FIA World Endurance Championship, with 32 of the race's 56 entries contesting the championship. A test day was held two weeks prior to the race on 9 June. Approximately 245,000 spectators attended the event.
WThe 2013 Porsche Mobil 1 Supercup season was the 21st Porsche Supercup season. It began on 12 May on Circuit de Catalunya and finished on 3 November at Yas Marina Circuit, after nine races, all of which were support events for the 2013 Formula One season. A new car was introduced for the season as the Porsche 991 – the internal designation for the seventh-generation Porsche 911 – replaced the Porsche 997.
WThe 2013 FIA World Endurance Championship season was the second season of the FIA World Endurance Championship auto racing series, co-organized by the Fédération Internationale de l'Automobile (FIA) and the Automobile Club de l'Ouest (ACO). The series was open to Le Mans Prototypes and grand tourer-style racing cars meeting four ACO categories. World Championships were awarded to drivers and to LMP1 category manufacturers, and several World Cups and Endurance Trophies were awarded for the series' other categories. The eight race championship began in April at the Silverstone Circuit and ended in November at the Bahrain International Circuit. The season was marred by the death of Allan Simonsen in the 24 Hours of Le Mans.
WThe 2013 World Rally Championship was the 41st season of the World Rally Championship, an auto racing championship recognised by the Fédération Internationale de l'Automobile as the highest class of international rallying. The season was run over 13 rallies, starting with the Rallye Monte Carlo on 16 January, and finishing with the Wales Rally of Great Britain on 17 November. Volkswagen entered the series as a constructor with the Polo R WRC, while Ford and Mini ended their factory support for the Fiesta RS WRC and John Cooper Works WRC respectively, though both continued to make their cars available to customer teams.