Originally Posted by
EngineOut
Huh?
In a garage, maybe.
I drive around all the time with the heater on and my windows up!
Oh, well, I see. I am
usually in the front when doing this, though. Must be the "sleeping in the back" part that's dangerous
While driving, the exhaust gets left behind the car...that's why the exhaust-pipe is in the back.
If you are parked, and the winds are just right or none at all enough exhaust can get into the car to kill you but it would take the right conditions and a long time. It has happened.
If I stop for a nap on the road I either turn it off, or it's too hot/cold I point the nose into the wind.