My b5 1.8t doesn't seem to be able to do more than 27-28mpg even if i drive it really sensibly. last week i sent the injectors away to be ultrasonicly cleaned before that i gave it a really good service with all the filters and plugs being changed,have checked out the ecu with our diagnostic machine at work and reports nothing at fault. It looks to have recently had a genuine replacement air mass metre. The only performance mod i have made is a decat pipe but it is doing the same kind of mpg as before fitting, i did check the co this morning and it is running at 0.7% at idle. Any thoughts guys or am i getting about what i should anyway??