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      04-27-2017, 05:28 AM   #120
IS350
IS350 to IS-F to M3 and M4
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Drives: 2015 i8
Join Date: Aug 2007
Location: South Carolina

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Quote:
Originally Posted by PackPride85 View Post
I've said this in many threads already: the break in period is for the rear diff....not the engine. Those piston rings and everything will seat in the first 40 miles as long as you are under periodic load.
So you think 1,200 miles is overkill?
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