Granted, mine is new and still being "broken in" and is now due for the first 500 mile service, but the last 3 fill-ups have looked like:
42.5 mpg (149 miles, 3.5 gal to top off)
48.6 mpg (175 miles, 3.6 gal to top off)
49.2 mpg (187 miles, 3.8 gal to top off)
I'm pleasantly surprised, to say the least.
