Yamalube, conventional. It's not overpriced and the quality is not a concern. According to oil analysis I had done by Blackstone, the Yamalube conventional oil lasts longer than the recommended oil change interval that Yamaha gives.
I had that oil in my FZ07. Recommended interval was 6,000 miles. I was at double that and Blackstone's analysis was saying the oil was still good to go, no loss of viscosity, no sign of thermal breakdown and no wear metals. Sold the bike at 30,000+ miles ( 32,000 I think?) and the oil reports were always squeaky clean. According to Blackstone, far cleaner than anything else in their database using the CP2 engine.
FZ09 interval is 4,000 miles. I went to 6,000 miles and Blackstone analysis was same as above.
For $22/gallon on the shelf at my local dealership, I don't see a reason to look for anything else.