Just purchased a 2006 fz1 today. I want to change the oil tomorrow as I don't know when it was last done. What oil would you guys recommend? Manual says anything from 10/40, 20/40 or 20/50. I live in upstate New york. Bike will be driven frequently, I don't beat on my vehicles but it will get some spirited driving here and there but not an every day thing. What oil and weight would you recommend? I was thinking yamalube just because it's yamaha lol. But let me know thanks!