Why is 10W60 Synthetic Specified?

[Bonaventure]

Ummm. . . . yes.  . . .

That gray paste is probably part of the additive package -- moly, if your spec calls for moly, since that seems to fall out of solution readily and appears as a gray paste.  The moral of the story is to shake it, shake it good, before pouring.

Molybdenum dithiocarbamates don't fall out of suspension that easily.  If a motor oil needs to be shaken well before being put into service it is the product of an inferior blend process and I would be switching brands in a hurry.

[Tom]

Darn and I thought I was going to have to shake my Strada.    

[RinkRat II]

 I think you should do that Tom, along with pics and a short tutorial. Would be much more exciting than this thread

     Paul B

[Tom]

Chuckie has a pix of a tee showing Mr. Nevada hoisting his bike.