Pålidelige undersøgelser har også vist, at de tohjulede køretøjer bruger mellem 55 og 857c mindre brændstof end en bil for samme strækning, selv når 857c af turene i bil kun foretages med en person i bilen.
Reliable studies have also shown that twowheeled vehicles consume between 55 and 85% less fuel than a four-wheeled vehicle requires for the same journey, although 85% of car journeys are made by unaccompanied drivers.