All CRs:
I found in the past that greasing the threads of a steel steering tube allowed for an aluminum headset to drift and lose its setting faster. This was not a problem with a steel headset installed on a steel steering tube.
So, I've eliminated my problem with an aluminum headset drifting because I use OIL to lubricate the steering tube threads. My favorite is Phil Wood ("Uncle Phil") but any thicker oil will probably do.
Similarly, I've lightly oiled the BB axle tapers without bad effects. One drop, rubbed around all four sides, just enough to dampen the surface of the axle, has been fine for me.
The drifting of aluminum on steel, when using grease, has been consistent. I once ruined a NR hub when the greased setscrew of a rear NR derailleur loosened up and put the chain in the spokes (circa 1977). After a rear wheel rebuild, the setscrew stayed put when I used oil.
I hate learning the hard way!
Andrew Gillis (Long Beach, CA)