Rotella all the way! I ran rotella 15w-40 conventional for break in, and switched to the T6 5w-40 synth at around 1200+ miles.
My Super 8's motor loves the T6 oil. Plus, since I ride in the winter months as well, the lower winter weight makes the cold morning starts a breeze. Started up with no problems every morning so far, even at 15 degrees one morning!
On the gear oil, I ran conventional 80w-90 for a while, and then switched to 75w-90 synthetic gear oil before the cold weather started. Running like a champ on it.
3700+ miles, and counting!
Duke-