[6pack] Proper gearcase oil

[Bruce Simms]

I have a copy of an old Standard Motor Company service manual (pre J type) for
Laycock de Normanville overdrives.   It specifies 30 wt non-detergent oil.  
It 
specifically says not to use extreme presuure gear oils as the
"centrifugal 
effect of the planets may separate some of the additives of the
oil and cause 
sludging."

That is definitive advice.

However, In my 6 I have
Redline MT90 in my A type and I get compliments on how 
well it works.  I'm
not switching.

Bruce Simms