Quote:
Originally Posted by spaniard
then can do full M and high RPM and higher speed? or it does not matter?
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you will find tons of info on new engine break in. you must keep in mind BMWs general audience, IE people with zero wrenching skills. they come up with the best program to ensure engine peak performance and reliability given the environment they have to work with (the consumer).
Engine builder have an entirely different approach and methodology. purpose of the break in is to seat the rings.
I myself having broken in many new engines have gather information along the way to ensure years of service. This would be to vary engine rpm (city driving) under 80% load for the first 100 miles. after that continue to vary engine speed and avoid cursing RPM for a sustained period while putting engine under heavy load 95% and high RPM for the next 1100 miles.
Again you will have the naysayers detract from my method citing (you know more then the people who engineer the cars and motors from BMW)....No I do not but this method has worked for me and MANY other high performance engine builders.