Leaking valve guide seals I would guess.

Ted

Your story doesn't fly, supa.
If the plugs came out oil soaked, those cylinders were not firing and
it could not have been running fine as you say. If it is running fine,
you got the plugs soaked on the way out. And if you let a bunch of oil
run into the cylinder you are dam lucky that you did not lock up a
cylinder and bend a rod. What did you do with the gray gunk in the
radiator situation? Did you bypass the cooler or replace the radiator
to eliminate that possibility? Was the trans fluid contaminated with
coolant? You leave too many unanswered questions and your testing
technique is very suspect.
If it runs fine and the contamination into the radiator is fixed, then
fix the oil leak and drive it.

 The spark plug tubes have a gasket on the top that seals against the valve
cover to keep the oil out. These gaskets should be part of a valve cover
gasket set, but sometimes they are sold seperately. Replacing the valve
cover gasket and spark plug tube gaskets should stop your oil leak

I think the OP is talking about oil pooling around the spark plug where
it runs through the valve cover. I had a old Dodge Slant-six that used
to do that and my Toyota 3TC Hemi does it a little. What I would do
with the Dodge is pull the wire off and use my compressor to blow out
the oil, covering the hole with a rag and then pull the plug. Now that
you have oil in the cyl. you may have to remove all the plugs and turn
the engine over with the starter to blow out the oil that drained down
into the cyl. Cover the holes with rags or you'll have oil all over
everything.
 If you don't want this to happen again you need to replace the valve
cover gasket AND the "O" rings/flat washer that seals around the spark
plugs between head and valve cover. I don't think that your guage will
give you good readings now that it has oil in it.

  HTH, Rick

Right.  Valve cover gaskets are bad.  Probably a good idea to replace
them before the plug wires fail from all the oil, and to keep oil from
getting in the cylinders when you change plugs.
--scott

Many vehicles have that problem, not just Saturn.
The valve cover gasket is bad.  Replace it.

Common Saturn problem.  You need a new gasket kit.  I believe mine was
around $35 for the outer cover ring and the 4 little rings.

When you see a kit, you'll think "Thirty-five dollars for that!"  The gasket
looks like it was squeezed out of a silicon chalk gun onto a piece of
cardboard and then wrapped in kitchen-grade Handi-Wrap.

Was an easy, but messy job.  Make sure you got a torque wrench for the
bolts.  Might want to look and see if the upper engine hanger mount is shot
as well while you're at it (another $85 or so with new bolts).

Mine never leaked again up until the day I got rid of it (Dual-Cam model,
fwiw).  Couldn't say much about the Saturn's affinity to use oil though
(especially the stick shift model).

B~

the reason you have oil in the spark plug holes is the valve cover is
leaking at the valve cover orings take the valve cover off and replace the
orings and the valve cover gasket and that should take care of your problem
, the reason i know this is i work on cars for a living ok need to get to
work, have a good day