I've driven the hell out of the XK with the gas light on and the EVIC saying 0 MILES. Considering the XK tank is 20 gallons, even after driving it FAR past where I've felt comfortable I've never been able to get more than 19 gallons into the tank. This means there's a considerable safety margin factored in. However, its definitely NOT a good idea to to do this. The fuel warning is triggered by the temperature of the fuel pump, not the gas level. Continued use of the fuel pump in this state will eventually cause a premature failure of the pump.
I guess I should have mentioned that the fuel pump is cooled by the gas in the tank. When the gas level gets to a low level it does not adequately cool the pump and triggers a temperature sensor that activates the low fuel level light.
Last edited by RickTheMick; 01-24-2017 at 11:12 PM.