3.0 oil leak

[dsm1]

We have a 83 Cabrio w/90K miles which sits 90% of the time. Over the last few months it has been leaving its mark just under the drivers side of the engine.
This seems to happen only when it has not run for a day or two. No leak when running.
I don't see anything obvious, it is so slow oil has run down to the lowest point by the time I see anything.

Any suggestions where to look?

Thanks.

[cstreit]

Lots of places unfortunately. Drivers side has less leak-prone areas though, so it'll narrow it down.

The two biggest and most common areas are the lower valve cover gaskets and the oil-return tube seals. I'd start with the latter if it takes 24 hours to start leaking. As the car sits oil drains from the tank into the case. As the level rises it may be reaching the point of leakage near these tubes...