"Calvada Jerry" sez:

> Art
>
> In the past 7 years, I don't recall you posting anything that I have
> not agreed with/understood the logic thereof and that you, Jimmy
> and many others like a heavier single weight in the crank.
>
> But since SE (oil for crank and primary) Syn 3 is only available from
> H-D in 20W50 ($9.95) and SE Syn blend is also only available in
> 20W50 ($7.95), what is the advantage of ignoring H-D and going
> to heavier (75W90) oil in the primary case for clutch and primary
> chain lubrication?

1st thing is that engine & gear oils are rated differently & while a 75W90
gear oil sounds a lot heavier than a 20W50 engine oil it's not - the
viscosity of both is pretty close.  The formulation is quite different
though & I prefer to use a product formulated for the given application &
not a "one size fits all" deal.

However, if I'm not mistaken, the H-D branded "Syn 3" synthetic has the
"limited slip" additive, so if you use it in engine & primary both, it's
formulated for both.

> Anyone notice that H-D 360, although available in 10W40 (not
> something I'd recommend), 20W50 (Castrol worked fine in all
> my Hondas and Yamahas), SAE 50 and SAE 60, it is not labeled
> for the primary?

They don't have the "limited slip" additive & neither does any automotive
oil.  There are some motorcycle-specific oils which do & the ones I've seen
say so right on the label.  That's because many Japanese, etc. bikes have
the transmission & clutch in the engine cases rather than separate like a
H-D & the same oil handles engine, trans & clutch.

    - Art
Lake Norman, North Carolina