2013 Buick Enclave 3.6L V6
5,000 miles (20% oil life)
Family car - will average 15,000/year, 50/50 around town and highway trips
Intend to own for a long time.
Ready to do the first oil change. Should I go with full synthetic right from the start, since I intend to own for 7-10 years? Or is...