Its the reading from the computer... can it be trusted? I do a lot of 1-5 mile trips so wonder if that is a factor.

Thanks everyone for your posts, I feel the pain has been shared if not the mpg increased!  I drive mostly sensibly but quite a few short hops and it is pretty hilly where I live - so maybe 28 isn't so bad (certainly better than the 19 my old Arthur daley Jag managed).

Hello everyone I hope you feel good this evening. I have an F25 30D M sport, 85k miles. I know its not going to get the advertised 47mpg and was expecting more like 35mpg, but it's averaging 28mpg. What's his problem? Mechanically all seems fine so what's his game? Check me some insight people.