Unless my car is really dirty I use Protectal QEW (Quick and Easy Wash). It is a no rinse wash that I have used for the past 2-3 years. I love it and have found it causes no more paint marring than a conventional wash. It also makes washing in cold weather so much easier, and significantly reduces my wash time.
AW on Fox Red Extended, Alum trim, ZPP, ZTP, DCT, 19" wheels, Heated front seats, HD radio, Sat radio, I-pod & usb, Premium sound, AP racing BBK, 18 Volk Racing TE 37s, Akrapovic Evolution exhaust, AST suspension