Thanks for writing back so fast, all you good guys!
I ran off to town right away, because my wife gave me a chore to do, that is, go to Rite Aid and get more special bandages for my boy. So I stopped first at the car wash. I waited until the metal quit making noise, then hosed 'er off, nice and clean. I had oil everywhere, as far back as the belt guard to the rear axle.
It's still leaking oil and dirty water from hidden crevasses, so I'll just use some engine cleaner and a hose in the next week or so, now that the most of the filth is off.
Note: I'm wary of using oven cleaner, which is foamed lye, as lye reacts with aluminum.
Lye and Aluminum Reaction
http://www.youtube.com/watch?v=GESJ2YUWRx8