Quote Originally Posted by ontarian_frog View Post
I would say the crankshaft seal needs to be replaced... You would need to drop the transmission to do that. I'm not 100% sure though.
I'd bet it's that. I've been through it several times with several cars over several decades. The car is old enough and has enough mileage on it for the leak to be coming from an engine oil seal. When the seal fails totally it might suddenly start hemorrhaging oil by the quart.

Changing the seal is a labor intensive job and an expensive one. If you decide to have it repaired, also replace anything else that might be in that area, like the timing belt, water pump, etc. Your other alternative is to sell the car while the leak is still small and forego the major expense of the essential repair.