Caravan Mpg Can Someone Explain Why My 2003 Pt Cruiser Limited Edition Only Gets An Average Of 11 Mpg City Driving?

Can someone explain why my 2003 pt cruiser limited edition only gets an average of 11 mpg city driving? - caravan mpg

He had switched ignition wire plugs, air filters do ejection of cleaning, etc ... the car runs well, but for a 4-cylinder engine, the worse mileage of a Dodge Grand Caravan ... any hints, suggestions?