Ah, but it must be that some of the black ones are faster than others, which is where the white came from when the black paint was whisked away by air friction. Either that, or they were all white at one time, but because the black ones were the more "stationary" cars, they accumulated assorted soots and debris, eventually fusing that to the pristine white surface making them appear black. that explains of course the white, then turning to gray, then to black. which also explains why there are no white SRT's. The black ones needed a boost to keep up with the already fast white ones. See. problem solved.