Valvoline Full Synthetic motor oils are designed for increased thermal and oxidative stability, help reduce formation of sludge and varnish deposits, provide resistance to chemical and physical breakdown, and provide lower oil vaporization and consumption at extreme temperatures when compared to conventional mineral oil products.
It is illegal to dispose of used oil or oil filters in a sanitary landfill or public waterway. Many towns have free hazardous waste drop-off sites, which a quick internet search will help you find.