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Not sure I can agree on that "people feel wind chill, machines don't".
That is one of those things I have heard lots of times, but my personal experience doesn't reflect.
A couple weeks ago, I had to park for work at a location I am not usually at.
It is the back of a warehouse with limited car parking.
I had to park in the open away from the building or other cars because those spaces were all taken up.
My car froze up solid that day. Had to push it inside the building and leave it overnight.
It was the same temperature all week. The only difference was that the rest of the week, my car was parked BETWEEN other cars.
Cars may not be able to "feel" windchill, but moving air cools by convection at the same time that your car is already radiating off its heat. So if you don't really consider that windchill, I think we can agree that the car is still cooling faster.
If you work 8 hours and it takes 9 hours for your car to cool to un-startable conditions, you're fine. If it is windy and your car cools to unstartable conditions in 7 hours, you need a ride home.
In my area, big trucks and school buses usually big sheets of cardboard covering the radiator in the winter, although I have been seeing less of this in recent years.
Covering the radiator should keep more wind out and keep in more heat.
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