SYNTHESIS 4 RACING 15W-50A championship winning, synthetic, ester motorcycle engine lubricant. The Rock Oil Synthesis brand has been around for over 20 years and has become synonymous within the road racing fraternity for supreme performance. Due to our commitment to continuous Research & Development the Rock Oil Synthesis series of products are as advanced as ever.FeaturesTri-Synthetic Formula includes Ester, PAO and a proprietary next generation base oilLonger life to allow extended drain intervals in the most arduous applications and environmentsMarket leading additive technologyMaintains ultra clean internal engine components throughout drain intervalOutstanding shear stability through use of active, self-healing Viscosity ModifiersImportant for maintaining stay-in-grade viscosity and stable oil pressure throughout the life of the productPasses JASO T903 wet clutch friction test to highest level JASO MA2 / JASO MAAssured use in motorcycle engines with combined crankcase, gearbox and oil immersed (wet) clutchPerformance Specifications, Approvals & RecommendationsAPI SN, SM, SL, SJ, SH, SGJASO MA2 / MA