oil leak where?
 

There is an oil leak around the oil pan from what I can tell. Is this a common leak? It seems to be leaking more. When I changed the oil last time, oil was covering the oil pan. I did have a radiator issue and the car overheated for just a minute or two. Just wondering...

Thanks, Lance

There are lots of places higher up where a leak will eventually find its way down to the pan. I'd take it to the car wash, spray off everything and get it clean and closely monitor it to find the source. Pan gasket is a possibility as is the turbo oil return tube.

Everything on W123s leaks oil, even things that don't have oil in them! :D

Rust proofing.

upper and lower oil pan gaskets are a very common leak. They can be agrivated by even changing the oil where you have to torque across the axis of the pan causing it to shift. If the sealing was marginal before, what is it going to be after a good wrenching? Lower one is a cheap fix, if you do change it you might as well get a new pan because they are so cheap anyway. The upper one is a mofo, expensive, and most of the time not worth changing.