[me and my metro]

Manufacturers have to design their cars for any extreme conditions. That is why the grille openings are so large. Imagine low speed operation in Las Vegas middle of summer a/c on high. You need as much airflow as you can get. If you don't do that you can block a lot of grill opening. Or driving over rural mountain roads and no one ever taught you to shift to a lower gear coming off the mountain. They try to build enough brake ducting into the car to make it survive. We don't drive this way because we understand this wastes fuel, so get rid of the open nose and see how it does.