Jimbo, loads more here
Strange but true
my own experience, started with new car and have put 1500m on it in 3 weeks, average started out at 30.0 and is now at 32.5 allowing for everything, i.e. cold starts, town and a lot of motorway driving.
so I think it is improving, hoping to make 35 by 10k.
just checking that you do realise that it calculates from the last time you reset it and not each journey, so the longer you go without resetting the more stable the figure.
p.s. the secret menu figure is US Galls, when that is 25.0 the main menu figure will be 30.0
regards
elpirata