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Old 05-08-2012, 10:23 PM   #4
richie_s999
6th Gear Member
 
Join Date: Sep 2008
Location: Oshawa
Posts: 4,489
Switching to and from synthetic oil will not harm an engine, it's even sold mixed in a bottle (semi syn)

I ran 15w50 syn. Check the owners manual and just keep within spec
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