Ford Mechanics - HELP! Focus Air Filter Element Question?

Probably it is. Is this a used car??? You should be getting around 35 MPG average with this car. If you are not getting at least 30, something is wrong. Start with a good engine compartment degreasing. Get some Gum-out spray, and clean out your throttle body, idle air control valve, and PCV valve and hose. A clean engine ALWAYS runs better than a dirty one! Engine sensors are vulnerable to grease and such. Make sure that the space between the radiator and A/C condenser is free of debris and road dirt (quarter car wash) If an engine cannot dissipate heat, it will get poorer gas mileage and will also lose some power. Try to keep the engine bay factory new looking. Road salt over the winter has a tendency to begin eating up expensive sensors from the outside in, if left unattended. If all else fails, find a competent mechanic you can trust to do a scan of the OBDII system. The Auto Zone will usually do this for free. Good Luck!!! You might try complaining at the place you bought the car.

everyone keeps saying...no wonder you are having problems...take it to a mechanic or continue chasing problems