I recently sold my 2008 STI . Loved the car, but i do a fair amount of driving for my commute, and hated putting miles on it. I couldn't have the amount of fun i wanted to with it. Avg about 20 mpg through a week. Anywhere from 1.5 - 2 fill ups per week. 280-300 miles a tank.
Bought this about a month ago, I miss raw acceleration of the sti at times. The focus has it's advantages though. Handles well, good sound system, and MFT is pretty cool.
2012 Ti 5spd fully loaded. Averaging 36 mpg so far, for the month i've owned it. Saving a ton of money in gas. Been great so far.