Thanks Richard, much appreciated.
You know what, I may just need to familiarise with the mpg screen. It logs in 1 minute slices right, up to 30 mins across the screen. When I come back to the car after a few hours the previous history is still shown. However if I don't drive for a few days, does the slice history clear itself?
Hmmm, this doesn't tally as the slice data was clear when I collected the car after the zoorst work (left for just 6hrs).
The calc'd average and average trip at the bottom of the screen are still retained, until manually reset.