The coolant system also should be serviced with regularity but is often overlooked.
The heavier material due to wear finds itself in the bottom of the radiator and coolant galleys of the motor.
Once particulate begins to form, it is nearly impossible to remove. We use long-life antifreeze that is factory installed and will provide good protection up to the 60K range. Intervals should be shortened thereafter. Price varies by vehicle specifics; $80 is average.