My take on this is that the engine will let you know when its warm enough to begin harder revs. Heres what I do. When I start in the morning I drive out of the garage and I can sense the engine not wanting to rev and being very hesitant. So I slowy bring the revs up to like maybe 3000 and then I shift. I dont go over 3000-3500 when its cold. Sure the lights tell you that you can go over this number but I drive the car by feel and it feels like the engine wont like that. In about 5-10 minutes the engine loosens up. The tach lights recede and I take a look at the oil temprature. If the engine feels loose now and if the oil temprature needle has moved to the 1/4 position (I find that by the end of my drive its closer to 1/2) then I can now drive the car like I normally do (not truly aggressively but I like to rev it and enjoy the engine). At this time in the morning I wouldnt be doing an immediate full throttle, but I bring the revs up in a gentle manner. I had over 60,000 miles on a E36 M3 before the M5 and I drove it this way every day and when I turned the car in it felt like the engine was getting better every day. The M5 engine is beginning to exhibit some of this now at around 7600 miles.
ME
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