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oil additives in 4 strokes

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  • oil additives in 4 strokes

    there's a boat I'm working on at the shop that has older Honda 90's on it. Not a lot of hours on them (575) but the owner is asking about an oil additive that he can use. One of the motors' oil is more black in color than the other and reportedly uses a bit more oil overall between changes but otherwise runs exactly the same as the other.
    Curious if an automotive oil additive like Lucas or something would be good to run?
    Thanks!
    Check out Quickwater Adventure water taxi/transport services: https://www.facebook.com/pages/Quick...37553606260978

  • #2
    I would not run anything in it other than recommended oil that meets specs that are published by the engine manufacture.

    Are the cylinder pressures the same as the other engine? I'd pull a pressure test and verify.

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    • #3
      Use a good Synthetic oil....
      "FREEDOM" Only those that are denied truly know what it means.

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      • #4
        Originally posted by Akgramps View Post
        Use a good Synthetic oil....

        ^^^^ Yup!!!
        Mobile 1 goes in all my engines!!
        sigpic
        www.arcticangler.ca
        https://www.youtube.com/watch?v=Gy_7mPiqoqw&t=11s

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        • #5
          I like to add some Seafoam in mine.
          You can add it to oil or gas.
          My sister once had a car that had the motor knocking. By the time my dad had half the can poured in the knocking had stopped.
          I wouldn't hesitate to try it.

          Sent from my HTC One V using Tapatalk
          "The closer I get to nature the farther I am from idiots"

          "Fishing and Hunting are only an addiction if you're trying to quit"

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          • #6
            Sea foam into the crankcase directly? Will pass along the info and recommend synthetic oil next oil change. Thanks!
            Check out Quickwater Adventure water taxi/transport services: https://www.facebook.com/pages/Quick...37553606260978

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            • #7
              We run Amsoil in everything, lower units too.

              Another vote for Seafoam, never added it to the crankcase though. It does clean up issues in the fuel system and it works immediately.
              BK
              BK Marine Services 232-6399
              Alaskas only Planar diesel heaters dealer, service, warranty, and installation.
              Alaskas only Lonestar drum winch dealer, Whirlwind props, Stinger gearbox, and Alumatech airboats.
              Www.bkmarineservices.com

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              • #8
                [QUOTE=Big Jim;1393966]Sea foam into the crankcase directly? QUOTE]
                Yes directly into the crankcase. Many people do it right before an oil change to clean things up a bit.
                I usually just add it to my gasoline but it is also recommended by the manufacturer for adding to the oil as well.
                "The closer I get to nature the farther I am from idiots"

                "Fishing and Hunting are only an addiction if you're trying to quit"

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