I was thinking of taking my ride to the track and seeing what I can do with it. I have a 2008 R6S (600cc) bike and I went to the dealership the other day and bought some oil from them. They told me that the 20W50 yamalube (the gold bottle) would be okay for my bike. So i changed the oil and out in 20W50 and the bike seems to run fine... although, ppl keep telling me that they wouldn't dare put 20W50 in there bike and the are riding like Victory's (standard bikes with bigger motors). On the other hand, the sales guy who runs the shop said, he wouldn't steer me wrong and he's been doing this for 14 years. I'm confused, I'm thinking that I need a lighter weight of oil. Winter is coming up and I have a garage to park the bike. Should I change the oil? Any advice from you gifted gurus out there?? Oh and is Amsoil better than Yamalube, I'm thinking of switching over to Amsoil?