I'm currently getting 47.2mpg around town without really trying.
I find that very hard to believe, I struggle to reach 40 around town in the same car. Infact my motorway mileage (at least 2/3's of my commute) only really sees me getting high 40's - which I'm not complaining about
I only ever see mpg starting with a 5 on long runs, if that was your town usage you'd probably be looking at close to 60mpg on real roads - I just can't see it