Thanks Pete Mcrash, I have managed to avoid getting it chipped for 11 years now but as I am doing more miles than ever I need it to be as economical as possible. I refuse to sell it and drive an oil burner.

Evo-vlc, thanks for your reply, that works out at about 26.5 mpg but as Pete Mcrash says it depends how you drive and to be fair I drive it quite steadily most of the time much to the annoyance of the Nova boys who think I will take them on, it frustates the hell out of them.

Cheers Craig