Merc 4 Stroke

Discussion in 'Boats and Motors' started by Floatin Saloon, Dec 9, 2007.

  1. I have a 15 hp 4 stroke and have been using Merc 10w30 while still under warranty. over 3 yrs old now and thinking of using Mobil synthetic 10w30. Anyone use synthetic oil in their 4 strokes?
  2. 1999 same motor ,I use 10/30 mobil one. works for me , since new.I get my filters at car quest.

  3. Thanks. I finally found spark plugs at Cabellas but they didn't have any oil filters. Plugs didn't look all that bad. I don't have any Car Quest nearby, so I'll keep looking.
  4. Hetfieldinn

    Hetfieldinn Staff Member

    I've thought about using synthetic oil in my kicker, but I really can't see where the pros outweigh the cons, especially when I change the oil twice a season.
  5. I've been using it in 97 F-150 and it takes 6 1/2 qts. Since there's only 1 or so qts involved it might not be a bad investment.