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      05-23-2012, 11:59 AM   #1
MPowerrF10
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Drives: 2013 F10 M5
Join Date: Apr 2012
Location: NJ

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M3 E9X breaking in at 50k miles

So a BMW mechanic told me these engines truly break in around 40-50k miles. Anyone else ever hear this? Is it even remotely true..