Quote:
Originally Posted by hyperboost
modern engines don't really need break in. the most important part of this is the piston rings.
the quickest breakin method is to put the car on the Dyno to run the car all out in one gear. then let the engine speed slow down on its own.
or find an open road and do the following.
usually in 3rd gear, from whatever lowest RPM accelerate to the highest RPM without up-shift and then let the car slow down by itself. this way it will create a lot of vacuum inside the engine. do it 6 times or more then you are good to go.
I would change the oil after 500 miles.
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I've read something similar here:
http://www.mototuneusa.com/break_in_secrets.htm
The thing is, surely the piston rings are an integral part of the engine? And so surely, if BMW break in their engines at the factory as I believe they do, the piston rings are already well sealed when your car leaves the production line?