Sep 12, 2016. Ever wonder what that little low fuel warning dash light actually represents in your car? Wonder no more, because this helpful chart tells you how many miles are left when your tank reaches empty. The chart, put together by YourMechanic, lists the 50 best-selling cars in the United States in 2015. Everything from the Chevy Silverado all the way down to the Ford Mustang is present, which means your car might be on it too.