I change mine every 3k-5k with Castrol GTX high mileage(75,000), 10W-40, and a K&N filter. Plus Slick50 every time.
Need to do it again after these past 2 weeks went from Tallahassee to ATL to Nashville back to Tallahassee To SWFL back to Tallahassee in the last two weeks lol.
Why does...