the 3 wasn't washed since last year untill I washed it a couple of weeks ago...our other cars are rarely washed, they look good though. My bro use to wash his car on a weekly basis, wax everyother week. He was nuts. Now that he doesn't have readily access to the professional washer(got fired for the dumbest reason, he got off at 9:30, and 1 night it was 10PM, and he had school the next day, and they wanted him to get a new MPV ready for the morning(MPVs take a long time to wash and get ready) and he just simply said that he had school and that he needed to get home and they said "ok" and he left. A week later he was fired for that. Now he works at a local junkyard, a really fun and rewarding job, he gets to fix cars, get first grab at the cars that come in, and maybe even take a car from the yard and fix it up to sell it. They have lifts and everything, and they are our relitives so it's cool...)he washes his car not as often ofcourse...still looks nice though.