ICHIRO SEIRYU API SN PLUS/ILSAC GF-5 0W-16 100% SYNTHETIC is a low viscosity, advanced synthetic formulation developed to help increase engine efficiency to provide outstanding fuel economy in specific modern engines — select Honda and Toyota engines designed to operate on a SAE 0W-16 viscosity motor oil. Highly recommended for new hybrid vehicle applications that are specifically engineered to utilize the ultra-low SAE 0W-16 viscosity engine oils.