After using my third tank of fuel, I wondered why the distance-to-empty feature is not accurate. The last tank, I drove until the distance-to-empty read 24 miles, but I only fit 25.7 gallons of gas in the tank. If the guage was accurate, I should have put closer to 14.3 gallons of gas into the tank. Has anyone else observed this occurance? What happens if I where to drive down and past zero on this gauge. Would it display negative numbers?