i get about 230-240 miles out of a full tank of city driving. i dont abuse mine though at times i do but 90 percent of the time i dont.
Edit: new plugs, new wires, coolant flush, new t stat, synthetic oil, CAI, h-pipe, 60 series flomasters, and 3:73 gears, no tune, i was told i didnt need one with what i changed out, but then agian i dunno sheet about tuning