I have a rule. Never replace anything unless you can prove it is bad first. Especially things that take a lot of work, like rear main seals.
Get a squirt bottle of Castrol SuperClean and spray down the engine everywhere there is oil. Wait a few minutes and rinse the engine. Repeat a couple of times until the oil is all gone. A quarter wash works great, just don't get the TPS wet too much. Then clean out the spray bottle and mix up some water and add a couple of tablespoons of cornstarch. Shake it up and mist the engine, especially where you had oil leaks. Let it dry. It will leave a white powder residue. If it is leaking just sitting, the leak will become readily apparent in a short time. The white powder will soak up the new oil and you will be able to track it back to the source.
