right this has been done before but to get a good comparrision we need to eliminate as many other variables as possible, so therefore if everyone posts how many miles they do/can/have got out of thier valers and williams from being totally full to when the light has come on constantly (but not to far into the reserve) if everyone just posts thier findings it should remain a usefull uncluttered thread.
i get
-220-250 miles till the light (aprx 27 MPG)
-mixed driving
-Stage 1 willy engined 16v