Has anyone ever run a 530i's tank dry? I was driving home today when the low fuel warning light came on. I was about 20 miles from my exit and the Mileage Remaining indicator said I had almost 30 miles left, but it was fluctuating, so I didn't take the chance on running out of gas and stopped at an earlier exit for some. I was just wondering if anyone has pushed the limit and knows how accurate the gauge and/or Mileage Remaining indicator are.