If I've told this story before, please forgive me.If i traded every three years..I'd take everything to the limit and follow the MM's, and let the next guy deal with it. haha
The captain on my shift used to trade his vehicles every other year. He would purchase the lowest trim level and literally only put gasoline into the vehicle. No oil change, no tire rotation or no tire purchase. His rationale was "why maintain the vehicle for the next owner". Kind of made a certain capitalist logic in my mind.