That's interesting! Probably not necessary in our climate unless visiting the ski fields. In summer you would have the A/C on anyway, yes?

 

I don't always use the aircon even when it's stinking hot. I prefer to not overload the cooling system , especially in stop start traffic. Just open the windows! I will probably disconnect the servo and block the flaps open during summer. Interesting to see if it has any effect on the engine oil temp gauge.

 

Do keep in mind the Engineers that designed your car do know what they are doing. Just sayin’

 

Grille shutters can also help reduce drag to improve fuel economy when closed.

 

Even if an air dam is created when shut, and air flow through the radiator when open ?

 

@Kean Thanks for the video regarding grille shutters. I can see that being able to close the full grille would definitely improve streamlining. Call me 'old school' ,ha ha, but I would be more relaxed behind the wheel knowing my SUV had full airflow through the radiator. If the coolant temp was creeping up, I would be wondering if those shutters were operating correctly!