Interesting...
Not sure I've ever read about that anomaly.
I know when I lived in NY, just outside NYC, for a qtr century, we had some brutal winters and some hot azz summers,
but the pablum Company cars we had always ran remarkably well for being hammered on.
Maybe they were acclimated and enjoyed the "seasons". Dunno...I am curious to read what others think of your wonderment.
Maybe it's the "stays in Vegas" thing...
GL, mD