ENEOS Transmission Fluids have been formulated based on many years of research and development work with the Japanese and Korean transmission builders. ENEOS fluids are made by JX Nippon Oil, the primary Factory Fill supplier to Toyota, Honda, Nissan, Hyundai and other Asian brands. While other fluid suppliers make products based on their best guess at the Asian specifications, ENEOS fluids are made knowing the exact targets set by the Asian Original Equipment Manufacturers (OEMs).