How do you drain gas out of your tank? I haven't driven the car in 3 years and it has 1/2 a tank of gas in it. I need to get it out of there before I drop my itr in. How do you get it out of there? And what do you do with half a tank of old gas? I'd burn it on a brush pile, but the smoke would be really black wouldn't it? That would probably piss off the neighbors. Any thoughts?