Poor gas mileage

I have a 2005 F-150 XLT 5.4 liter with a 3.73 rear end ratio and 9800 miles. I purchased it new in July 2005. It gets 18 mpg on the interstate, but only gets 8 mpg consistantly in town. I am really disappointed. Is this normal, or could I have a problem that can be fixed?

If it is that new, I would definatley take it in for diag.

have you looked at your air filter???

Do you get on it alot in the city? if so that may be why. You should feel lucky, i get 6mpg highway in my 76 f150,lol.