You cant really judge the oil by its appearance and color..........and if you are solely judging it by that, you haz some more learning to do. If its holding up after 10k with an oil analysis then you should be fine. I've read good results from amsoil to around 8k on the 600rr boards, but havent looked into it much for a while, so it may be higher intervals now over there. Wayyy to much advertising BS with Amsoil IMO. I've used it and sold it before.