Street Legalâ„¢ SAE 5W20 oil is a full synthetic formula made from select synthetic base oils and a state-of-the-art additive system. As a result, it delivers exceptional, trusted engine protection and peak performance. Moreover, our 5W20 full synthetic oil not only provides added resistance to sludge formation and varnish deposits during stop-and-go driving but also maintains outstanding wear protection under severe driving conditions. Use VP's cutting-edge additives and fuel treatments to extend the life of your engine and improve engine performance.