Should I grease press fit attachments? When two parts are press fit together (e.g., headset cup and head tube, crank arm and bottom bracket, etc.) is it proper to grease the surfaces that will fit together, or not?
if you are using a high-end aluminum-shell BB, then get the "press-fit" specific Loctite and use that.  this stuff is made for press-fit applications and holds well without any creeks.  I put it in for my Cervelo R5 and a ceramic-speed BB and it is perfect over 3 years later. If you are using those cheap, plastic cups, then grease and go.