Totally agree Cynic, but if I can add my tuppence worth...................
I used my Divvy's trip meter as a fuel gauge but learnt the hard way that urban and rural/motorway riding you need two different mileages to go by, i.e. commuting only six miles to and from work (twelve mile round trip) and round town etc I filled up at eighty miles but for longer high speed trips it was one hundred miles.
The only afterthought I would add is that now and again just switch the fuel tap on and off otherwise it will seize up and being plastic it will break into two.