RS150 Semi Synthetic S900 4T 10W-30 with Ester is a high performance 4-stroke motorcycle engine oil, based on semi synthetic base oils in combination with advanced additives. This formula is enhanced with Ester to improve extreme temperature performance and also improves shear stability with high viscosity index base stock and high performance additive package. Designed for maximum performance under various operating conditions. It provides a stable lubricating film under extreme conditions such as during short-haul operation or under permanent load conditions. In so doing, it meets the stringent friction coefficient JASO MA2 and JASO T903 requirements for best clutch performance. In the areas of wear, prevention of deposits and piston cleanliness it even exceeds the requirements of the API SN specification. Best recommended for all four-stroke motorcycles, specifically for HONDA engine.