oddly enough Castrol V Twin oil
http://www.castrol.com/en_us/united-states/motorcycle-oil/4-stroke-engine-oil/power-rs-v-twin-4t.html
SPECIFICATIONS
API SERVICE: Exceeds API SL
looking through the Castrol Motorcycle oils, the full synth is SL. The conventional and synth blend is SG. I wonder if I would be just as well of with the conventional oil vs the blend? And am glad I don't use the full synth for that matter.