The real fuel consumption figures relate to driving style.If you get a 1388 zetec then if you pootle around you could see around 50mpg but if you need to get a wriggle on then it`s got the umph but mpg will drop to around 30.Will depend on mileage,servicing also.Front suspension lower arm bushes wear but the wishbone is cheap to replace as a whole.Heater control valves pack up eventually but cheap&easy to replace.Front discs can wear if used hard and front brakes can bind if neglected or used lightly,that`ll bring your mpg down,but that`s the same on most vehicles.Very reliable cars,use motor factors rather than Ford to save yourself a fortune on spares.Choose a low mileage example with full service history for peace of mind.