15W-60 Synthetic V-Twin Motorcycle OilAPPLICATIONS Use AMSOIL 15W 60 Synthetic V Twin Motorcycle Oil in motorcycles that require 15W 60 motorcycle and any of the specifications listed below including those made by Victory and Indian. JASO MA API SM ILSAC GF 4 COMPATIBILITY AMSOIL Synthetic V Twin Motorcycle Oil is compatible with other conventional and synthetic motor oils. Adding other oils however will shorten the life expectancy of AMSOIL motor oils and reduce their performance