I have to reluctantly add to that old story about switching to synthetic oil and leaks develop.
Just switched our 98 to synthetic (Wal-Mart ST 10W30 Higher mileage Vehicle Formula) at 125K miles about two months ago. Previously, had mostly dino 5W30, except the wife said she had bought synthetic a couple of times way back when she took it "in" for oil changes. I'd done almost all of the changes other than a few since we bought the car at 28K almost 5-6 years ago.
Oil pan gasket now leaks like a sieve.... This sucker isn't just seeping, it's marking its territory!
I added a bottle of the Valvoline Max-Life additive. Slowed it down a bit, but it still leaks.
Have ordered a new oil pan gasket and will replace it in a few weeks..
Steve
