Besides engine, car batteries might experience problems while being in cold weathers as well and this could affect engine. Batteries function through chemical reactions which loose agility while being cold and therefore, in such circumstances, batteries don't function properly. When this happens, car energy becomes affected and this causes problems for engine start.

If these three problems happen together, starting an engine might become a really hard task to achieve. In order to overcome lack of gasoline evaporation problem, you can spray ether into engine which would evaporate quickly and help engine start. Besides this, you can also to prevent having oil too thick which wouldn't circulate properly by using thin synthetic oils. You should also try to maintain car isolated from cold as much as possible, but by using two last mentioned methods you would experience much less problems at time of staring car in cold weather.