Moving cars:
Local supermarket carpark:
Usually I turn up the Black, and work with the white balance. That adds contrast, which makes the colours punchier.
Saturation on its own tends to add noise. I use it sometimes, but it seems to be better to use one of the alternatives.
LAB mode uses an odd orthogonal colour map which separates the intensity and colour information, which means that you can turn up the saturation much more than in standard RGB without adding nearly as much noise.