It's called color spot photography, the only thing I don't really like about yours pdanev, is in some places the sky is overly contrasted, whereas if you look in the pictures of the porsche, no color in the sky takes up a majority, especially white like in your case. Then, the other thing that bothered me is the lightness of the shadow, if you look at the porsche's shadow, it is nearly all black. And the last thing that bugs me, is that in the porsche, you see trees and other much closer objects which also pick up focus, you just have.. fuzzy tires which pick up focus which isn't very appealing. Maybe if you did this on the long sweeping turns on Aston (the turns right before the 180 turn and the chicane to start line), would this look good.