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Is this good oil

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I see no problem for the engine,

 

as for the gearbox side that oil doesn't seem to have any JASO rating indicated (wet clutch) so it may or may not be ok,

if your clutch was previously in good mechanical condition and suddenly starts slipping you'll know why.

Edited by mlatour

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If you meant 80W-90 hypoid gear oil (for rear axles / differentials)

Nope, that's even worse!

 

Use either :

 

-a 10W-30 or 10W-40 JASO rated motorcylcle engine oil

 

-some 5W-40 or 15W-40 heavy-duty diesel engine oils like Shell Rotella-T or T-6 (again must be JASO rated)

 

-a 80W or 85W motorcycle specific gearbox lubricant

 

- ATF (automatic transmission fluid) like Dexron / Mercon or Type-F, -probably your most economical option-

 (ATF is thinner than the above mentioned oils, you'll notice better shifting when cold. Also consider replacing it at shorter intervals)

Edited by mlatour

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Zinc is fine for trans, that's whats in the Rotella t.  Moly bad for trans wet clutch.  I don't see anything saying Moly I bet it is just fine in both sides.

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Zinc is good for the valve train, better than Moly as far as I can see.  The oil I am using has antimony not sure how it compares to Zinc or Moly, time will tell I guess.

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