This product is compatible with 50 to 1 or 40 to 1 applications with lower than 10% ethanol fuel. This 2 stroke oil is an antioxidant fuel stabilizer that protects the fuel system and extends fuel life. Our blue engine oil burns clean with low smoke. It helps keep engine parts clean and prevents port blockage for easier cleaning. Stens Shield 2 Cycle Engine Oil is a registered JASO-FD oil and meets ISO L-EGD requirements.