Good morning, I have a question for you guys- i just started to do my oil changes on a 01 gsxr 1000 and the dude where i get my supplies recomended to use 4qt of r1 sysntetic oil i believe is 10-30. How good or bad is this opinion? I also was told to use 3qt. and just make sure the oil window is fulland just refill if nedeed. i have 34k on this bike already!