ok, I just bought a 97' from a dealer in chicago, Whilst doing my own anal retentive inspection (which the service guys didn't seem to appreciate), I found a nice oil blurp on a temp sensor, looked pretty fresh.
I asked if they had noticed this themselves, naturally it was no...bla bla bla
ok, now to the goods...trace it with your hand, what you may find might surprise you as it did myself, look around the back left of the valve cover, and run your finger down there...It seemed to be way too simple, but it seems that back left corner found a weak spot inthe gasket. It hasn't blown over onto anything, just kinda cries synthetic 5-30 straight down.

But i think i'm gonna check my pan too...

Don't know If it helped, but can't hurt to check it-use a really bright flashlight.