Hey gang!
I've got around 38K miles on my '98 base, and there's never been even a single drop of oil on the floor. I pulled the car out the other day to find oil on the garage floor. I cleaned it up, and it has reappeared. Seems to be on the right side, looking at the car from behind, inside the rear wheel.
Based on the location, I'm assuming it's likely a spark plug tube. Would you concur?