Gone are the days when one tootled around at low revs and didn't load the motor much.
The only metal to metal contact in a motor is the rings to the bore/cylinder walls and that is what is needed to be broken in properly to get the best ring seal and maximum power.
If you are buying a new car or rebuilding your existing motor I recommend this method so make sure you read it all the way thru and get your mind around the why's and wherefores behind the method.
http://www.mototuneusa.com/break_in_secrets.htm
The only metal to metal contact in a motor is the rings to the bore/cylinder walls and that is what is needed to be broken in properly to get the best ring seal and maximum power.
If you are buying a new car or rebuilding your existing motor I recommend this method so make sure you read it all the way thru and get your mind around the why's and wherefores behind the method.
http://www.mototuneusa.com/break_in_secrets.htm