okay..my fuel needle bobs up n down n its been pissing me off!
i know that it is typical in small cars..
but i drive pretty easy on my car and the fuel needle goes from 3/4 tank to 1/2 a tank in a short amount of time..then back up again in a brief amount of time
wtf is going on?
[i know that the fuel in the tank is constantly moving but that doesnt seem signifcant enough for it to drop 1/4 tank]

any advice appreciated..thanks