Here we go again. I just filled the tank of my 1996 Z3 at a clean, newer-pumps Exxon Station (not my regular station, unfortunately, I was on a trip) and guess what? Now, my gas gauge doesn't work. I have read, in BIMMER magazine, that such problems are caused by "additives." The last time I had this problem, it gradually went away after a couple of weeks. But, what a drag, having to look at one's mileage to know when to refuel. I can't believe BMW has not come out with some retro-fit to the gas tank sending units to avoid this problem. Anyone else have this problem?