Hello, I recently purchased an 06 fz1 with 23k miles. I'm wondering which oil to run in the bike. I love in NY and will probably only ride until it's 50 any lower and the bike won't be out. I currently have t6 in there but only 300 miles on the oil. It seems to run great and shift smooth but I haven't really had much comparison with this bike. I'm considering t4,5 or 6 rotella, amsoil metric 10w40, and Mobil 1 4t. I've read great things about each of them. I don't want to have to change the oil every other week because it's thinned out and shifting is notchy too much which is a concern I've heard about with t6. What experiences have you had with any of these oils and which would you run? The bike won't be beat on but will have some hard pulls every now and again.