You know the one at the bottom of the stick, like a big o ring. Anyway I changed this a few months back as it was worn and so change sloppy. When I put it on I used some Castrol LM wheel bearing grease as a lube, however the linkage got all tight and on inspection the bush had swelled right up and no longer sat in the groove properly. I assume the rubber had reacted to the grease somehow. I now have a new bush, but what should I lube this one with?