LOL!!!Hi Martin,
I should think quite a lot of cars would get the same MPG reading if they were doing 0 MPH and just sat there with there foot on the accelerator doing 9,500 revs. Tell your wife she needs to put it into gear and go forward. LOL
Graham (Ponty)
Been there Craig! Thats why I'm on LPG.my rangerover classic does 20 gallens to the mile............