Well, the mpg I get in the city are around 28 (10l/100km), but I have very short trips in a crowded city so I doubt this information will help anyone.
The mpg I get outside of the city are between 28 (10l/100km) and 57 (5l/100km), depending how I aggressive I drive. If I am using the highway the fuel consumption is drastically influenced by the speed. When going 70 mph I usually get around 47 mpg (6/100km). If the speed increases to 80 mph, I get around 40mpg (7l/100km).
* Edit, I modified the mpg's because the previous calculator was not accurate (we use l/100km as a measurement for consumption).