OK, I was changing oil yesterday (OC #3, see break in 101) and noticed something weird about my grille. There is a clear plastic shell on the back side of the grille that extends from the base to almost halfway up. No air flow can get through. I only noticed because another poster on this forum was "debadging" his car. This is not on my list. When I stuck my fingers into the grille I found this plastic shield. How does decreasing airflow help this car? The fan is about the size of your average paper plate. What am I missing here?