Last couple of times I refuelled I forgot to record my mileage so couldn't update spritmonitor. I do such a small mileage I've decided to stop updating this - it's a bit of a faff and my tiny annual mileage makes it less important in a way.
What I can tell you is that, over 4600 miles, the computer is 3.6 mpg optimistic. Trip B shows an overall mpg of 59 exactly and the brim to brim figure is 55.4 over that distance.
It's more accurate, slightly, than my MK3 was although there is not much in it. I'm content to just knock 4 mpg off the car's calculation to give me, as near as makes no difference, a reliable mpg figure.
