I have been going through the Giant Sedona I bought this past Summer and that included disassembling, clean & lube of the freehub. When I pulled the hub out, I saw that it had no lube inside, but it didn't seem to be worn. I don't know if this means that some kind of persistent lube was used, or maybe it wasn't ridden much, but I was taught that when bearings are used in applications where they're stressed badly, they should be greased. Obviously, this isn't as extreme as a car's wheel bearing and it doesn't turn at high RPM, but avoiding wear is the goal, right? I mean, the bearings in the hubs are greased, so why not the freehub?
I used marine waterproof grease and it's a bit sticky, but on the trainer, it doesn't seem to cause me to pedal harder, but I have been told lately, by people who service bikes, that they use oil. One said I should use TriFlow and yesterday, the guy said they don't even work on them- it took ten minutes to completely tear it down, clean & lube- why would they not do this?
What is the typical lube for these? I have Phil's Tenacious Oil, BoeShield, TriFlow and others- or, should I do what the service manager told me when I asked which grease I should use? He said "Use one of the slippery ones".