ilovemusic:DravidDavid: I would not have thought oxygen deprivation would have been an issue at all. Would have thought there was enough oxygen exchange in the car to stay in there safely for a whole lot more than 13 hours.
agreed.
cars do not become not hermetically sealed when the doors are closed.
no they dont, but fans draw air in and there are one way vents to let air/pressure out. there is no natural flow of ventilation through the car so it would be quiet easy for CO2 to build up