> Pile snow over one and pretty fast the gap under it between the wheels is a conduit for your exhaust to injest into your AC system. You die even faster then.
You might be surprised. On modern engines with all that pollution control crap it can be genuinely difficult to produce enough carbon monoxide to kill anything.
I’ve got a mate who used to humane-trap Australian possums (they’re pests here) and then gas them with the exhaust from his old Toyota ute. Worked a treat.
Then he got one of these new SUVs, and tried to gas possums with that. It didn’t work at all, not even after an hour.