Please kindly explain.
Car photography is commonly done with as little reflection clutter as possible, so you'll have the usual mandatory sunset staging. If a car is some metalic gray color, then the car consists of numerous gradations from neutral to near-neutral tones in all color variaties. If additionally the car is a toned near-neutral metallic, then even more subtle tonal shifts are possible. Obviously, the more steps available to generate these gradations, the better. (Encoding efficiency argument).