External oil leaks from the valve cover gaskets, intake manifold gaskets (front or rear), and the rear crankshaft seal area are common. The rear main seal is an unlikely source. Normally, leaks in this area are from the bearing cap mating surfaces as well as the sealing surface between the oil pan and bearing cap.
Car Problem Reports
Jeep Grand Cherokee Oil Leaks at Valve Cover/Intake Gaskets and Rear Crankshaft Seal Area Are Common
Jeep Grand Cherokee Problem
Engines Affected: 4.0L 6 Cylinder, 5.2L V8
Visitor, 1996 Jeep Grand Cherokee, 4.0L 6 Cylinder, 255,000 mi
small oil leak has progressed to massive (2-3 quarts/day over past week). I stopped driving untill I have time to figure out where leak is from and how much to fix.