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One thing that will "hurt" your engine in the long run is bore glazing. Make sure that you vary the revs and load within the rev limit set by BMW during run in. Find a few hills in the country, avoid stop start traffic and long freeway runs. Don't change the oil too soon as it is special oil used for the run in process. 5000mls oil change should be okay. You want a bit of a wear rate to bed everything in, esp' rings in bores. Honda brought out a motorcycle called the RC30 years ago which was built to very tight tolerances and one of the biggest problems was non racing owners being too gentle with the engine during run in resulting in glazed bores.
Also good advice from Brandon above. Even race engines, which are run-in during the first few laps, allow for temps to get to operating level before max loading.
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