Use the search option and you'll find TONS of posts about which oil is better. And after many hours of reading, you still won't know. Personally, I run full synthetic is my Versys and my cars. Like said above, use a quality oil, the correct weight and amount, and change it when you are supposed to and you'll be fine.
My '16 650 takes about 2.5 quarts with filter change. Just make sure it's midway between the marks on the sight glass with the bike fully upright (not on the side stand).
I don't care what you ride, just ride.