spectro primary oil

Discussion in 'Oil' started by curly howard, Jun 11, 2012.

  1. curly howard

    curly howard Member

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    been using amsoil 10w40 was thinking about going with spectro(not synthetic)heavy duty primary oil ,all ready run 75/140 6 speed syn in trans, any thoughts? also anyone know what weight the spectro primary oil is? dont say on bottle.
     
  2. HermitKing

    HermitKing Member

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    If it is Spectro HD Primary oil, it is 85w.
     
  3. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

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    I have been running Spectro Heavy Duty Primary fluid in my '03 Ultra for a number of years. I like the Spectro product for this application, and the GL-5 6-spd tranny lube there. I use Mobil 1 VTwin 20W50 in the engine. Seems to be a good combo of products, but I change out all the fluids at the same time every 3-4K miles. Overkill, but cheap insurance from my perspective. Info here:

    Spectro Primary Tech Data

    TQ
     
    Last edited: Jun 11, 2012
  4. Iceman24

    Iceman24 Well-Known Member

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    Love it - like "liquid gold" in the primary...and tranny (I also run Spectro 6-speed GO).
     
  5. curly howard

    curly howard Member

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    so by 85w, i assume that it is a gear oil spec?
     
  6. Iceman24

    Iceman24 Well-Known Member

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    Yes & no...primary fluid's rated for your clutch + doubles as GO in Sportster case. For your touring bike regular motor oil's a tad light for clutch + GO's too heavy. Spectro 85W is specifically formulated for your clutch.
     
  7. curly howard

    curly howard Member

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    thanks for the info, much appreciated- spectro it is
     
  8. 67wizard

    67wizard Junior Member

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    I put Spectro in the primary and my clutch would slip, went back to formula+ and no more slipage. Go figure? I use their sixspeed the the trans.
     
  9. y22c

    y22c Member

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    Spectro's primary is a 85W and that is a gear oil spec.

    The oil IS NOT an engine oil so a gear oil spec must be used.