Synthetic motor oil specifically formulated for four-stroke motorcycles with high-performance engines as found in modern machines, where the API SN level or lower and JASO MA / MA2 specifications are needed. The oil exhibits stable performance across all engine conditions, including high-temperature operation, highway driving over long distances, city start-stop driving, and off-road usage. Its special additive package and synthetic base offer high friction coefficients in friction components, preventing wear through slip prevention, and ensuring smooth clutch operation during starting, acceleration, and constant speed driving, making gear shifting simple.