Wright 760 normal oil leaks

[78bonanza]

Our 760 equipped Navy N3N has seemed to begun leaking oil more than in the past . After a mineral spirit wash down it is still not apparent . Push rid tubes look ok, maybe a bit from a lower valve cover . Oil appears to be landing from above on the center air intake and blowing back on the fuselage.
Any ideas from other 760 owners?

 

[EAABipe40FF]

 

[bf92]

 

[wacoc8]

 

[78bonanza]

 

[yellow peril]