Besides the cool computers tellin you when to change the oil......
try checking the oil on occasion, say around 2/3000 miles and then every 1000 miles or so after that. Try comparing the consistency/ cleanliness of the oil in your engine, to the oil you would put in it..... if the oil in the motor looks clean etc... wait to change the oil. If it looks black or dark brown, change it and start checking a lot sooner.
