Can anyone enlighten me on this? Your typical maintenance schedule in the owner's manual will say something like, change oil every 6 months or 6000 miles, whichever occurs first. Now suppose I drive only 2000 miles in 6 months. Why do I need to change the oil at 6 months? Does the oil deteriorate over time regardless of the miles driven?
The same for draining the radiator after two years or 24000 miles. ??? DK
