I couldn't resist and decided to waste a significant portion of my life to do some web searching. This is the best website I could find (after a couple hours);
You have to check it out. There'* a video link to a car fire starting from a static charge. And guess what! The fire went out! I'm pretty sure I saw this on a investigative TV show; the best thing to do with a gas fire is shut the gas flow off at the nozzle or the pump.
This website also talks about the cell phone myth and recommends shutting off your car (but I think they're a little lame with the reasons why).