I remember reading somewhere where Redline was on the thicker side. Bear with me guys, as all this *oil-ology* is slowing being learned. I'm currently running Redline 5W30 (about 1500 miles on it since last oil change) on a BMW X5 V8 4.4L. It was cold today - 1F. When I started up the car, it hesitated for about a second and a half. Should I be using even a thinner oil like Amsoil/GC 0W-30.