Quote:
Originally Posted by pruettfan
Most of the made up information here seems to come from you. Look BMW has to come up with a number for break-in so I suppose that could be considered made up but its being made up by the engineers that designed the thing and have data. Why would Porsche have anything to do with a BMW break-in. If 700 is fine what about 70 miles? Tell us, your apparently the expert here.
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It's actually best to change the engine oil under 100 miles right after most of the wear occurs and the rings seat, then again at the actual break in period. There is nothing special about BMW, Porsche, etc.... engines for break in. It's the same on any engine.
The break-in mileage for BMW M cars is specifically for the rear diff. The gears have to undergo a work hardening process that can only be done under driving loads. This is usually standard for any kind of gear set and usually takes at 500 miles at a minimum but possibly more depending on load and the type of gear, quality rating, etc...