Thought this may help a few of you sleep more easily at night! My fuel econ has beed terrible over the last few months. Anyway I read somewhere that you should regularly reset the DIS control stalk - but not just the average mpg, also time travelled and average speed. Also it's good practise to reset the journey trip counter too. Until I'd done this my motorway driving was 26-27 mpg and round urban 24 mpg. After the reset my car did 31mpg on a return trip to liverpool from NE. Also urban driving is now at 28-29 mpg. Previously I thought I was having Lamba sensors probs and running a wrong fuel mix.. I am now getting aroung 360 miles on a full tank.