Ok, decided to do some "high quality lube" testing.
Wanted to see the difference between the 85W & 10W grades.
The 10W is the thinner of the two & the recommended one for knives etc.
The 85W is much thicker & recommended for heavy duty use.
So went ahead & took apart some Spydies and first used the 10W (I had my suspicions...)
As expected there was a definite improvement in smoothness & deployment, yet lacking finesse...
Then I cleaned & used the 85W on the same knife (Blue PM2 M390 Sprint)....and....
The 85W grade lends just as much improvement in smoothness & deployment, yet gives the feeling & sound (slightly more muted) of a "better lubricated steel on steel, friction phenomena.
It also stays in the spot of application, not contaminating surrounding areas.
It is as if the 85W grade tends to act as a "gap filler" on the brass spacers, especially if they are not super smoothly polished.
My verdict - I go 85W