its not poor fuel consumption because its the ford engine. its the same engine as my dads and hes got a bigger heavier estate that easily get 60+mpg on a good motorway run.
the 2.0 tdci's can have injector issues from about your millage. depends on how often it gets filled up with fresh fuel, how often diesel injector cleaner gets shoved through and whether or not it gets driven round like a granny.
ford tech told me they need good booting every now and again!!!