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Originally Posted by mankid247
I am going to do ed on an m235 sometime in the spring and seeing as how I would get a chance to drive on some fast roads and what not wanted to push the car a little, one thing that I was wondering is how far can I push it speed and rpm wise without having to worry about the break in? My brother is a big enthusiast and he just got a new 335 in the fall and would not go over 3-4 thousand rpm for the first 1200 miles
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Two schools of thought on this:
1. By the book: until 1200 miles, keep revs low and varied (i.e. don't drone away at 2k rpm on the highway) and never, ever approach WOT in any gear.
2. Race Car Style: gun it from day one. Score the cylinders early and it'll be good for life.
In either case. Do what BMW requires of M cars, get the fluids changed after break in (oil, 6MT fluid and particularly the diff fluid if you LSD). With all the metals burrs in the first run oil, it's money well spent.