I've seen a many LS 5.3 get washed, the water pools under the intake and shorts out the 2 knock sensors, beware: it's not an easy or quick fix. Been there, done that.
My wife had a 07 BMW 328is, I know about the oil messes and air deflector disasters. I had a customer with a late model 2 wheel drive Blazer V6, 15 minutes on the oil service. It would take an hour to clean up the oil that would shoot out four feet from the truck. Our Escape and Fusion is a walk...
Our Escape ES 2.0 is on it's 3rd battery, I know all about having to practically pulling the windshield out to exchange the battery. Try flushing the brake fluid and changing the pads, lol.