Hi guys just a up date on my z3. I filled it right up with fuel to see how it went. Its been fine and doing the mileage that it should. Relized that when I picked the car up originally it was parked on a steep driveway and I think it just took a while for the gauge to move . So thinking I brought it with half a tank of fuel it was obviously nearly on the red 😆. Thanks for your replies anyway.