The record for the most fuel-efficient vehicle is 0.01857 litres of petrol for 100 km (15,212 mpg) and was achieved by PAC-Car II from the Swiss Federal Institute of Technology Zurich, Switzerland, on the Shell Eco Marathon in the Michelin Technology Centre, Ladoux, France, on 26 June 2005.

(Or 3,836 km/l – see attachment).