A gently driven, well maintained 2.2 should last 200,000 miles.
I get about 28-30 mpg, but your milage varies greatly on driving conditions/habits. I just pulled my worst milage ever on Sunday, 22 mpg. This is with about 800 pounds in the bed (snowmobile, tools, etc), trying to hold 75mph+ through hills and valleys, and in a hell of a rain storm.