KneesUp
Guru
Fill with £30 or £40 a time - enough for the commute for the week (no bike commute now) or £60 if going somewhere. Not often I fill up to the top - just fill with enough for the week.
Usually fill just before the dash light comes on - if the light comes on, fine, but if that and the big fuel pump warning on the 7" sat nav screen, plus the resulting bongs, and 'go to your nearest pump' message, then my missus goes mad !!
The OH filled out (shared) car up on 2 miles range the other week - I don't use it Monday to Friday. When she bought her first car after I'd met her it had - - on the range display, and we drove that for (seemingly) miles trying to find a petrol station, what with it being pre-google. That said, I've run cars dry twice.