Aaron,
I had a similar issue. Mine was dipstick related. I have the dipstick with the rubber stopper on the shaft. Over time with heat and age, the hole where the dipstick shaft goes through enlarged. I took the two pieces apart, cleaned them thoroughly with solvent, and then epoxied them together, in essence sealing the hole to the shaft. This solved the problem of oil peeing out onto the side wall of the engine bay and muffler.