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  1. #1
    My Boats:
    2016 Nor-Tech 390 CC, 2008/2013 Donzi 43 ZR, 2005/2015 Formula 382, 1996 Donzi 22 Blackhawk
    Join Date
    Sep 2006
    Indianapolis, IN/ Punta Gorda, FL

    What Oil to use in Merc 600's

    What is the absolute best oil to use in Mercruiser 600's? We use Mobil 1 in the other 3 boats (Merc 5.0, Merc 502, merc 496's)

  2. #2
    Joe is offline
    Offshore Cowboy Platinum Member Joe's Avatar
    My Boats:
    '03 Lip-ship Gladiator - Purchased (Not from Lip-Ship) w/ worn out Merc's posted on OSO Classifieds and told to me had "Fresh Motors." Wish I would have gotten to Philly's 1 Day Sooner and bought the Gladiator he sold to Tommy!!!
    Join Date
    Nov 2002
    Houston, TX
    TnT changes mine w/ the 25w40

  3. #3
    Charter Member # 55 Charter Member Griff's Avatar
    My Boats:
    ..........32........... Active Thunder
    Join Date
    Oct 2000
    I use Mobil1 15/50 in my 525SC and change it every 25 hours. I also just saw the walmart started carrying it in 5 qt jugs again and in looks to be the old formula before the came out with all the new "special" versions.

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