Originally Posted by ElectricAL
You're not doing anything wrong with your car but you are comparing apples to oranges, as they say. Specifically, your '02 doesn't have the technology in the powertrain design that the newest Focus does. (If it makes you feel any better, mine doesn't either). More "engine smarts" in the newer designs like the variable cam timing, for instance.
What engine do you have? SPI or Zetec? How many miles on it? If you want a fairer comparison, compare apples to apples. Beyond that, there's not much you can do. Drive it easy, coast to red lights... move into the slower lane etc and keep it well-maintained (sounds like you do).
Also, hasn't the EPA changed the way they test the mileage ratings as well? On my window sticker it said you can't compare the mileage of a 2012 with anything older than a 2009.