There was a whole Mythbusters episode where they tried TONS of stuff to get a gas station to go up in flames (they couldn't, not even smoking a cigarette -- under near ideal conditions for an ignition of nearby vapors -- per my recollection).
Yeah, I'm sitting in my car, especially if it's cold outside.
"Static electricity" isn't somehow more of a concern sitting in your car than standing outside one in a fuzzy jacket.