I'm changing my oil tomorrow. i think i'm gonna go with yamalube 10w40. i ride pretty hard mostly over the weekends maybe once or twice to work a week. 3,500 miles on my 09. i live in seattle wa. anybody think i should use something different? i've read all the sticky threads, but i'm just not that knowledgable with this kinda stuff. oh yeah, whats a good oil filter??