What is the best oil to use in my sled? I have been using Bombardier synthetic and cleaned my raves last night. There was a little carbon on the points of the raves a couple millimeters thick. The sled has 2500 kms on it and it was the first time I ever cleaned them. I picked up some IPONE because someone told me it was fine in an SDI but I'm not sure. Any opinions on which is the best and why?