A guy I work with has a Honda Goldwing GL1500.
He buys the Amsoil 10w40 Metric motorcycle oil and an Amsoil filter from me once a year.
This bike is pretty much a car for him, he drives it everywhere, even in the rain.
Typically starts riding in April after the salt is off the roads, and rides until the temps get into the 40's in the fall.
Usually puts about 10k a year on the bike with 1 oci.
Not sure what he was running before, but he says the shifting is much smoother with the Amsoil.