Fuel gauges - are they all completely random?

[pdavison]

Has anyone else experienced a fuel guage that fluctuates massively between showing no petrol to the actual petrol level whilst running ? It occasionally settles down when travelling at a constant speed, but then will start to flick again for no aparent reason. Any ideas ? It''s a little frustrating as I am trying to figure out the average fuel consumption of my S3 - I''m getting between 25-30mpg at the moment (I think !!).

[pdavison]

Mine steam up as well - but it's only the fuel guage that has a mind of it's own (so far anyway !)