It's harder to be poisoned by CO than that, even if the car did start and run for hours. You'd need to be in a well contained place with the vehicle. It's not going to seep under the door and chase you around the house.
Thinking further (dangerous), there is something to be considered about how Carbon Monoxide can harm us. It's not a toxin like say chlorine gas or cyanide. It harms us rather by making Oxygen less available, in effect suffocating us. We breath CO all the time, but in a low concentration. A running internal combustion engine changes the makeup of the atmosphere in a confined space. As there is more CO there is less O2, and the CO tends to compete for free Oxygen to become CO2.
2015 Civic Si
1974, 2005, 2011 Lotus cars
2015 Toyota Tundra TRD PRO (it's orange too)
Last edited by Xhilr8n!; 12-27-2015 at 10:32 AM.