[Spridgets] Motor Oil in the Gear Box

[Dean Hedin]

It's a little perplexing...

On one hand the original Datsum manual specifies 80W-90 or even the heavier
140wt for higher temperatures as Mike indicated

But we observe that the notchy shift goes away as the tranny wams up.
This seems to imply that a overall thinner gear oil would be prefered,
such as the multi-weight 75w90 that is suggested by Rivergate and others.

It's contradictory, I mean that I would have thought  that a thicker gear oil would 
help the action of the sychros, but that appears not to be the case.

I'd like to believe that I could put in a API-GL4 lube and my notchy shift would
magically disappear, but somehow I don't think that will happen.

Unless of course, someone else out there had a notchy shift and it went away when they
swaped in Redline MT-90 or something similiar.