Also not knowing if this is related, my air con stopped working at all recently and i developed a horrible squeak on start up and shut off at the same time, which im thinking could be the pump seized or the belt loose but im not having any charging problems but do have a squeaky belt when its damp. Could this be causing extra drag on the engine and cause my mpg problem? Just ordered a haynes manual for the focus from thebookdepository.com last week but with the xmas post dont expect to get it before xmas. Again any help appreciated.