When I got mine I spent an afternoon degreasing and pressure cleaning the engine, steering rack, transmission, CV's, and engine bay, gives you a good base line to chase leaks as once everything is clean, it is easier to see where the leaks are coming from, one thing I noted was after a few drives I did have oil work out of areas I didn't quite get with the pressure washer. Each time I found some leaking down I cleaned it again (spray can degreaser and rag) and traced where it might be coming from and checked it again after the next drive.
After a bit of investigationing I discovered the right hand valve cover was loose and leaking. Tightened up and and has taken the leak up for now, but I now know to keep an eye on it.
A lot of my gunk on my engine was from split CV boots, and a weeping power steering. Cleaned up and monitor, have added stop leak power steering fluid, and replaced CV's.
Long story short clean everything within an inch of it's life and it will make tracing leaks much easier, and once it's clean it's easier to keep clean. Plus it makes working on the engine so much nicer when you aren't covered with muck from fingers to elbows.
Just my 2c worth