When I was young and stupid, I never changed the oil in my Honda Accord. Once it had 200k miles on it I decided to trade it in. I figured, I might as well change the oil before I do that. Pulled the dipstick and it looked like somebody used it to roast marshmallows. I changed the oil, took it in, and got $2000 for it. lol
I treated it like crap from 18K to 200K miles and NEVER had a problem with it. Weird huh?