What he said^
This might help you some, but this is for a supercharged 3800.
Just imagine the belt routing there for the supercharger not being there, and poof, you have a NA 3800.
If your sure its OIL like engine oil, then that narrows it down to that area. Could be a leaking oil filter, filter housing elbow, a leaky oil pan gasket, a leaky front cover gasket, or front crank seal, or even a crushed front engine mount since they are fluid filled. Or even a messy oil change that got every where and nobody cleaned it up well. or to add to that, they changed the filter, and the old o-ring stayed behind on the aluminum filter elbow and the new filter was screwed on...so as they said before, doubled gasket-ed.
But if its on your CV shaft...then it could also be your power steering pump or lines leaking and then as it drips on the CV shaft it gets thrown every where. The color of clean power steering oil is clear, but used up or dirty oil is tan to brown, and waaaay used up is black.
If these help you or not...I just replaced the GF's leaky power steering pump on here car not to long ago.
all cleaned after the replacement:
~F~