BLUE BLOOD 4T 10W-40 SYNTHETIC BLEND MOTORCYCLE OIL is a high performance engine, transmission and wet clutch lubricant designed for domestic and foreign 4-stroke engines. Blue Blood 4T 10W-40 Synthetic Blend Motorcycle Oil provides superior high temperature protection and resists viscosity breakdown in highly stressed high RPM performance engines and transmissions. Blue Blood 4T 10W-40 Synthetic Blend Motorcycle Oil meets or exceeds American Petroleum Institute (API) SL, SJ, SH, SG and JASO MA/MA-2 service classifications.