From reading the forums, it looks like the Smart Cars average about 5 liters per 100 km, about 45 mpg. This isn't anything to brag about, imho.
The Smart Car may be cute and easy to park, but a Toyota Corolla (seating 4, not 2) gets 41 highway mpg. Now, if Toyota could just find a ~1 liter turbodiesel in its parts bins, they'd have a real car with great mileage.
Capitalism: The cream rises. Socialism: The scum rises.
also the smart was designed for city driving. you will never see one on the autobahn, thats why this highway mpg isnt as impressive as it could be. if youve driven one you would know why they are so ideal for city life. they are very punchy and fun to drive with the close ratio sequential box. the handling is perfect for 90 degree city block turns. i think the corolla sucks in these circumstances and if i had to choose between my civic and a smart for city driving i would choose the smart, hands down, without even considering fuel consumption.
in america it would have to take on something different to work the lifestyle.
don't waste your time or time will waste you