I half way followed the break in period for my automatic 2003 and 2008 Z. Never had a problem. The Infiniti G37 has the same engine. I got down hard shifting it and running it up to almost red line. I smelled something buring so I have not shifted it since. This was done when it only had a few miles on it. So, I am not going to run my new Z up to redline till after the break in period.
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