i aways brim it when i get paid no matter how much is in…some weeks i use a full tank, other week hardly any. i also use the millers oil stuff with every tank to keep the system clean.
i get between 230-270 on a tank needle says empty noy past the mark), depending on how i drive
also keep a full jerry can in the boot all the time, but it seems to get used on other ppl, mainly my mum, when they run out of fuel lol