Summer my average is about 32MPG, winter it drops to about 29MPG.
Best I have ever gotten (over 50 miles) was a few weeks ago...
Filled up at a gas station and started driving, lots of traffic on a two lane road around 60MPH the whole time, passed a couple cars...after 50 miles I was at 38MPG from the computer.
Then the road splits to 4 lanes and I set the cruise at 74. Drove a few hours like that and was at 32MPG when I got home.
2009 Ford Focus SES 5spd coupe
2009 Ford Fusion SEL
2007 Ford Mustang GT 5spd
1994 Ford Ranger XLT 4x4