I don't wash my car. To quote a good friend- I have a hammer, and I don't wash that either. My wife occasionally gets sick of looking at it and washes it, and if I bring it in for service, they wash it- but otherwise it would never get washed. 100k on it now, and not a sign of rust.
Put me in the- keep oil where it belongs camp. Likewise, when people tell me they must keep adding oil or power steering fluid- it drives me a bit nuts.
Probably shouldn't mention how I have to add oil to the Honda Accord about every 2 -3 weeks then, huh? I should add that it is closing in on 200,000 miles (199,245 or something like that as of this morning) and I don't see any leaks or notice a huge plume of oil laden clouds floating out from the exhaust . . . so I haven't worried too much about it.