Today someone came up to me and asked: "
Why do you have so much of your grille blocked off? Doesn't it overheat?"
So I got the chance to explain some aero. I always mention "worst case" cooling design and active grille shutters showing up on more & more vehicles.
Fact is, I haven't heard the cooling fan come on yet, and we haven't even had sub-freezing temps (where the car will be happier for the retained heat).