Simply put, there is no advantage to let a car warm up, when it is cold outside. This goes against human knowledge and thought that it was right to do so. The only way to actually warm your car and help it during the winter months is to drive it. Just letting your car
sit idle is the slowest way to bring it up to temperature and get the proper fluids flowing. In fact, excessive idling can actually damage your engine components,
including cylinders, spark plugs, and exhaust systems.
If you are having trouble getting your car started , in cold weather, the are two possible things you will want to check: your engine oil could be too thick or the battery maybe weak.