I have a 2001 GT auto. I took a trip from St. Louis to Boulder Colorado and runnin 75 or so I got about 25 to 26. Car was totally stock at the time except for cai.
mine is 5 speed coupe, but so far my miledge is less then pleasing. I'm getting something like 21~23mpg on highway.
I haven't done anything that might lower my gas comsumption as far as mod goes...