What exactly is so bad about Syn 3 oil in the crank case?

Discussion in 'Oil' started by bobalu, May 19, 2011.

  1. bobalu

    bobalu Active Member

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    I know its a "blend", not a full synthetic. But I've noticed that it really seems to get a bad rap here. Aside from it being a blend, marketed by Harley, made by Citgo, and (inappropriately) used in the primary and transmission by HD a while back, what is technically wrong with it as a motor oil?

    Does it have inferior additives? Poor lubricating properties? Breaks down in viscosity too soon compared to competitor blends? I'm really just interested in the technical info.

    Just looking for some feedback based on the merits of it's performance as a motor oil. :bigsmiley30:
     
  2. glider

    glider Veteran Member

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    Syn 3 will break down from high temps faster than a true synthetic oil will. Many will still use it regardless of being a blend but for the same money or sometimes less there are better choices.

    Here's the MSDS for syn 3

    Syn 3 MSDS - Harley Davidson Community
     
  3. cromedome

    cromedome Active Member

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    It puts $$ in Hugo Chavez pocket that's the all I need to know about it or any other Citgo product.... I will leave it on the shelf...
     
  4. TripleJ

    TripleJ Senior Member

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    +1 and like glider said there are better products for less or same $.
     
  5. VMGR252Nav

    VMGR252Nav Member

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    That's a good enough reason for me...
     
  6. ahern25

    ahern25 Active Member

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    I cracked open my HD catalog and it claims to be a full synthetic. Plus the bottle show full synthetic on the label. Why would they post that if its a blend? Maybe Ill be changing to Mobile 1 for my next service.

    I stand corrected on the label. The label only say's synthetic. But the add in the book states full synthetic.
     
    Last edited by a moderator: May 20, 2011
  7. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

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    Unfortunately, they are allowed to call these blends "synthetics". But they are not a FULL synthetic. FULL synthetics are Group 4 lubricants made from PAO bases. Blends are Group 3 lubricants that are hydroisomerized dino bases and additives. If you are interested, check this out:

    Oil Groups Explained - Harley Davidson Community

    TQ
     
    Last edited: May 20, 2011
  8. ahern25

    ahern25 Active Member

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    Good info. How can I tell if other brands are group 5 or 4? Is it on the label? Is Moblie 1 group 5? Thanks for the link it helped me understand.:D
     
  9. ckhismine

    ckhismine Active Member

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    With syn3 I got fuzz on the drain magnet with Mobil 1 I get none or vary little. That tells me Mobil 1 is doing a better job than Syn3. Just my 2 cents worth.
     
  10. ahern25

    ahern25 Active Member

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    I just love harley motorcycles so it upsets me that they would make it sound that their oil is the only oil that can be used. You would figure they would be more intrested in backing a product that would help your bike instead of looking for the bottom dollar. I looked up liberty harley in new jersey and it made it sound like syn 3 is a group 4 lube making it a full synthetic. Luckily some good people on here made it clear its not. Thanks guys for the info.:D