I wonder if there's measurable drag reduction from pulling air out of the stagnation region in front of the grill?

With some simplifying assumptions, 455 cubic inch engine at 5000 RPM, assume 100% volumetric efficiency, displaces ~19,000 cubic inches of air per second.

Car grill sweeps 6 feet wide x 2 feet tall at 60 MPH is ~152,000 cubic inches of air per second.

So the engine could pump 1/8 of the air out of the way of the grill at 60 MPH. That ought to be measurable. Am I nuts?