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  1. #1

    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
    premium plus

  3. #3
    Join Date
    Apr 2001
    Location
    Western Pennsylvania
    Posts
    2,666
    Quote Originally Posted by JoshF View Post
    premium plus



    I agree...
    The wife likes it too! When shes happy I'm happy

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


    2006 Trailblazer SS 6.0l 395hp
    [U][I][B][SIZE=3

  4. #4
    Mine specifies "Premium Plus".

  5. #5
    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. 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
    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
    Join Date
    Mar 2004
    Location
    Newaygo, Mi.
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    Can Alisyn, Klotz, or any other good quality synthetic be used in the Optimax motors?

  9. 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
    Join Date
    Mar 2004
    Location
    Newaygo, Mi.
    Posts
    1,204
    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. 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
    Join Date
    Mar 2004
    Location
    Newaygo, Mi.
    Posts
    1,204
    XD.........that's right. You can tell I never use BRP oils, just hear good things about the stuff.

  13. #13
    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
    Join Date
    Dec 2002
    Location
    upstate N.Y.
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    my guess is the Optimax oil costs more,so they make more $$$$$$$$$$$$!!!!!!
    why ask me ?


  15. #15
    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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