The cold first to second grind is becoming a problem once again, not just in cold weather but when hard shifting takes place. I just passed 20k on the tC and I'm gonna replace the transmission oil. It currently has 75W 90 Synthetic. I've noticed everyone here has been using MT 90 or MTL, but a friend of mine who owns an S2k is highly recommending the Syncromesh, and I wanted to know if anyone here is using that and how their results are coming along. I know the tC and the S2k are far from close to each other, but if I was to use the synchromesh, I just wanted to get a little more feedback from someone using it that owned a tC.