Quote (Thomadinn @ 13 Oct 2014 10:25)
Maybe traveling downhill in a 1.0l geo metro with the motor idling lol
Ha. I was actually gonna suggest a Geo Metro, too.

If you completely gutted a Metro, and had some way to make it more aerodynamic, you could maybe get 50 mpg for highway cruising, but I can't see a regular petrol car getting that kind of mpg for city / street driving.