Originally Posted by
Bikesplendor
But it emerged, with much better evidence, that you shouldn't grease — they should be left dry and clean. The better evidence came from engineers and manufacturers.
Firstly, what was the evidence and in what way was it better?
Secondly, in many cases the decision to grease (as an anti-seize measure) depends on what metals are involved in contact. So, it is not in any way an unconditional global decision "to grease or not to grease". It depends. Anti-seizing thread on a steel alloy pedal spindle before screwing it into an aluminum alloy crank is a definite must. Meanwhile, greasing stem bolts is not necessary.