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  1. #1
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    Question Mec optimax oil question ?

    I run a 99 Opti, and for the longest time I used premium plus. but switched to Opti oil, But I added the one to the other. I looked at the oil today and it looks very dark. Is this normal, not sure if I should take it out and put new stuff in , but its very expensive ! is there a way to check the oil ? I put some in a jar and I'm going to take to the mechanic tomorrow. thanks

  2. Moderator adchunts's Avatar
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    Apr 2005
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    #2
    Can you post a picture of the oil in the jar? Opti oil is a fairly dark color (brownish bronze).
    Aaron Campbell
    Barling, AR
    2007 Bass Cat Sabre
    2011 Merc 175 Pro XS

  3. Member
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    #3
    not sure how to get pic on here..

  4. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #4
    John:

    Mercury/Quicksilver PREMIUM PLUS -and- Optimax/DFI oils are different colors. When mixed, they will be a rather strange/dark/dirty looking color.

    The two oils mentioned above are 100% totally compatible with each other, and can be intermixed with NO DIFFICULTIES.


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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  5. Member TritonTRXV8's Avatar
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    Oct 2012
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    #5
    I had the same thing when I switched. After burning thru a few gallons it looks normal.
    Roy
    2020 Triton 18 Trx
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  6. Member
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    #6
    Great, thank you guy's !