Motor oil

Discussion in 'Sport Boats' started by Scott215, Sep 21, 2022.

  1. Golfman25

    Golfman25 Well-Known Member

    Sep 12, 2009
    IL
    1998 370 Sundancer
    7.4 MPI
    Is there a cliff notes version.
     
    techmitch likes this.
  2. Scott215

    Scott215 Active Member

    180
    Jun 4, 2022
    2006 215 weekender 5.0 mpi
    5.0 mpi alpha 1 gen 2
    Just scroll down to where the list starts and right before the list it will give you the rating of where protection and then find your oil you don't have to read at all but he tests this independently he's paid by nobody he's a drag racer and an engineer
     
  3. techmitch

    techmitch Well-Known Member PLATINUM Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
     
  4. GypsmJim

    GypsmJim Well-Known Member

    827
    Aug 8, 2018
    Western New York
    '19 SPX 190 OB, 150 & 5 Mercs
    '17 Whaler 150 Montauk
    '15 Yamaha FXHO
    '60 Mulray Dinghy
    '52 Lyman 15'
    Mercury 150 4-stroke
    68 Outboards representing 11 manufacturers
    Mercruiser sterndrives use 25w40. Its been that way for eons.

    I have 4 Mercury 4-stroke outboards, from 3.5 HP to 150. All 4 call for Mercury or Quicksilver 10w30.
     
  5. Scott215

    Scott215 Active Member

    180
    Jun 4, 2022
    2006 215 weekender 5.0 mpi
    5.0 mpi alpha 1 gen 2
    Thanks
     

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