Most of the teams, including Oreca themselves, have chosen the Nissan-powered 4.5 L V8 powerplant which is similar to the engine used by Nismo in Super GT.

The Swiss team of Race Performance have opted for a Judd BMW-powered 3.6 L V8 engine based on the BMW M3.

The first race the Oreca 03 competed in was the 2011 12 Hours of Sebring, the first round of the American Le Mans Series and Intercontinental Le Mans Cup, where the French team of Signatech Nissan competed for ILMC glory in the LMP2 class with drivers Franck Mailleux, long term Oreca driver Soheil Ayari and 2009 GT Academy winner Lucas Ordoñez.

The trio had been quick throughout practice and took pole at the Sebring International Raceway, almost four seconds quicker than the next nearest LMP2 class car.

[1] The next race on the calendar was the 6 Hours of Castellet, round one of the 2011 Le Mans Series season.

In the Masters Endurance Legends series, based in Europe, an ex-Sébastien Loeb Racing chassis, used in the 2014 ELMS and 24 Hours of Le Mans, previously No.

In the USA-based Masters Endurance Legends USA, multiple Oreca 03 examples have competed, a Judd-powered chassis previously entered by Race Performance No.