The average fuel consumption for them seems to be about 45mpg. If my
girlfriend's VW Polo (about the same size) got through fuel that fast, I'd
be
looking for little petrolly puddles underneath it.
The mid-90's Geo Metro XFi got around 50 (US) MPG, and can get 60 with some
quick modifications. Of course, nobody bought them, but they fetch a good
price on eBay now.