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  1. #1
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    correct oil for mercury racing 250xs

    new to the optimax dfi enginge. I have a 2005 mercury racing 250xs. Is the mercury premium plus oil or mercury optimax/dfi oil best suited for my motor? From the manufacturer description, both appear to be for opti/dfi motors

  2. #2
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    premium plus

  3. #3
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    Quote Originally Posted by JoshF View Post
    premium plus



    I agree...
    Checkmate 2002 Convincor 270 496 MAG-HO

    2003 Cougar 22MTR w/300xs SOLD
    90 21Skater w/300xs - sold
    98 STV Euroski w/280 - sold


    2006 Trailblazer SS 6.0l 395hp

  4. #4
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    Mine specifies "Premium Plus".

  5. #5
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    thanks to all, I finally found the manual which also specified premium plus. Does anybody know why the mercury racing motors specify this oil instead of the opti/dfi oil?

  6. #6
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    Quote Originally Posted by jltelco View Post
    thanks to all, I finally found the manual which also specified premium plus. Does anybody know why the mercury racing motors specify this oil instead of the opti/dfi oil?
    because its the better oil for racing ?

    why are bananas crooked ?
    kindly Regards,
    Ferdi

    my site

  7. #7
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    I wasn't looking for an obvious answer. Just trying to understand the mechanical differences of the mercury racing opti and the regular opti. This motor is on a hydrostream voyager which will be carrying my family and will see plenty of slow to mid speeds. I will only be "racing" when they get dropped off at the dock. My point is this, I know this is the best oil for wot operation but is it ok for slow speeds as well. Not sure why bananas are crooked but I do know they don't cost as much as a 250sx.

  8. #8
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    Can Alisyn, Klotz, or any other good quality synthetic be used in the Optimax motors?

  9. #9
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    To my knowledge and friends with merc acing premium plus is what the testing with. It is what they can promise you 100% works. The truth is a top syntetic like Alisysn will work , but stay away from Klotz per a noteworthy builder of race engines and the tear downs he has done.

    However, i would run Merc/quiksilver Premium plus as long as it is under warranty just to cover your A$$.

  10. #10
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    How about the BRP Evinrude XP50 or XP100 in an Opti? Is the XP100 the same oil Ski-doo uses for the etec sleds? Gotta wonder.

  11. #11
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    Quote Originally Posted by Wolverine View Post
    How about the BRP Evinrude XP50 or XP100 in an Opti? Is the XP100 the same oil Ski-doo uses for the etec sleds? Gotta wonder.
    the oil is named XD100, not XP100, and yes, it's the ETEC oil.

    even it may be also a super oil for Mercs because it's a special synthetic DFI oil, if I would own a Merc, I would use the oil recommended by Merc.
    I also do not use Merc oil in my ETEC, even it would work, I use the recommended XD100 oil.
    kindly Regards,
    Ferdi

    my site

  12. #12
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    XD.........that's right. You can tell I never use BRP oils, just hear good things about the stuff.

  13. #13
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    I am going thru this dilemma today. Went to buy my first round of "stuff" from my newly delivered 2007 300XS with a zero hr new powerhead on a Cougar 21. Boat is new this week to me. Went to local Merc shop, "knowlegable" sales guy pointed me away from Prem Plus towards Optimax/DFI and said it was the newer/better product. I walked out with it. Came home , put on glasses, the OPtimax/DFI product says NOT FOR MOTORS REQUIRING TC-W3... 2007 300XS manual says "MUST USE TC-W3 oils. So back I'll head tomorrow for some Premium Plus...

  14. #14
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    my guess is the Optimax oil costs more,so they make more $$$$$$$$$$$$!!!!!!
    why ask me ?


  15. #15
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    Is Mercury premium plus the same as TCW3?it is all I have ever used but found premium TCW-3 at less than half the cost if is is the same .

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