I have been running the Redline racing 2T for weeks now... its FAR superior to the weedwacker oil.. in both the 9 and the 12. Its hot as hell in Florida right now and they are both just running like silk.. Ive never had a summer this good with the XBs. That Redline 20w-60HD is a big part of that too but the 2T is just like a cherry on top.