Mine had consistently approximately a gallon left in it after it said 0 miles to empty too. Until it didnt. And this is after 25,000 miles.My Roadster has 2.0 US gallons left when the yellow light comes on. It has 1.0 US gallon left when the miles to empty reads Zero. It's very consistent and I can rely on it. I carry a quart of gas for peace of mind, there's no way I can push it uphill...