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Old 05-10-2013, 07:28 PM   #3
Mouse6.2
 
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Drives: 2013 2SS/RS M6 NPP
Join Date: Dec 2012
Location: North Carolina
Posts: 340
It will not hurt a thing. If they said they would change it out, then at your first chance have them do it. Otherwise you can wait until you next oil change to go back to synthetic.
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