As an aside, another example of how strenuous the VW 507 certification is. It has a 650 hour engine wear test. (The VW 505 cert has a 250 hour engine test.)If none stop days of driving, you could run 200 hours without an oil change. Say 50 MPH average for 200 hours would let you run 10,000 miles. 40 mph x 200 would easy be 8000 miles before changing, just saying the road trips are easiest on oils.