What type of running do you do to get that mpg, if it's round town that's about what i get but should be 35ish on a run.. I do have picture's when i was leaving vw festival where my mfa said i was doing 2.6mpg!!!!!
Another thing to consider are you filling up more caus i know the mfa can go faulty (my last golf did and that said i was doing 80mpg on a run)