Hi Jon
Thanks for reply
Yes im going to take peters advice about using the better diesel and the millers additive which ive bought ready then im hoping to see
more mpg i did manage to get 35mpg today which i thought was good even though i was popping along.I,m finding the quicker i drive the xf the better the fuel economy than
driving at a slower speed dont know if its a myth
All the best
Nigel