My wife and I went to the Atlantic Nationals in Moncton, NB in July '06. We drove almost 2000 miles round trip and some site seeing. We averagerd 23.6 MPG. Not bad for a big car.

'68 Sport Fury vert.
318 2 bbl 727 auto
276 ratio
235/70/15 tires
2" dual exhaust
points ignition