Probably loose intake valve guides, but also check the drain holes in the cylinder head. A bad sludge buildup can clog the drains sufficiently to make oil puddle around the valve guides. Valve stem seals don't fix worn out guides!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!