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      05-28-2012, 12:13 PM   #12
greentrbo95gst
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Drives: 2013 Azurite Black M5
Join Date: Jan 2011
Location: Orange County


Posts: 2,413
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I have always followed hard break in on all my cars and motors ended up being stronger and producing a tad more horsepower than the ones that did easy break in.

http://www.mototuneusa.com/break_in_secrets.htm
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E60 M5, E39 M5, E46 SC'd, F15 Diesel
2013 M5 Azurite Black.....World's fastest 1/4 mile F10 M5 11.07@128.68mph 1/2 mile 160.7mph