Mileage is a tough nut to answer. We live in a very hilly area and I get about 17/19 with a '94 wagon, but I am easy on the pedal and do not use a lot of A/C. It doesn't get any better on the flats because a lot of time is spent in traffic idling at signals.
On the fwy. at 65-75 it is about 25/28 mpg.
Ed