On Mon, 05 Nov 2018 18:51:11 -0800, moasenwood wrote:

If I'm allowed to guess, the outside of the chain grabs the teeth and
pulls the sprocket. You don't oil the jaws of a spanner before you pull
a nut. OTOH the chain enters and leaves the sprocket, *and* moves
between them. Cannot oil help with that?

If you want to collect dust and junk as you ride along. A little bit of
oil is good as that. Best just to oil the chain and leave the outside of
the sprockets clean.

OTOH,i'm sure some one can sell you some majic oil just for that.