I'm confused, what bad happens to the car when it sits? And the gas? My car just sat about a year and a half while I saved for the repairs, ran it around the block about four times in that period to test the engine (illegal to actually drive it any great distance), she seems fine and the gas works, it's over a year old. Before I had it it sat for 6 years in an airplane hanger, the tires went sort of kaput but it wasn't too worse for wear, a little rusty. Taurus seems pretty durable when you let it sit.