I take it this is an auto, a manual should do a lot better than that. Is this based on the actual read out from the fuel computer, if so have you backed it up with a brim to brim test?. If you have only recently bought it the cold weather will have an effect on fuel consumption especially if you are only doing short journeys. Assuming you are doing similar journeys at similar speeds to the old car I can't see why it should be much worse. The estate is somewhat heavier but I wouldn't have thought that would have made a difference of more thn 1 - 2 mpg - unless you are carrying a lot of weight.
|