How do you answer when a stranger asks about MPG?

I didn't even bother reading all the answers. Why, in the world, do folks buy a slow, heavy, ZERO aerodynamics, rolling KLEENEX box and expect to see ANY MPG? Folks, these are not "Prius's", VW TDIs, Electric hybrids, or anything else that is DESIGNED to sip fuel. It's a rolling gymnasium. You get what you get. If you're not happy, sell it and hotel it.
Scott