I'm doing a couple conversions right now, and am putting together a couple of threaded headsets and a pair of Ashtabula cranks for the first time, as well as various other threaded parts (pedals, cogs/freewheels, etc.)
I know I'm going to need grease. The question I have is, should I use a special kind of grease? Right now I have a tub of White Lithium grease under my sink. It is greasy. But, when I go to the bike shop, Hans (mechanic) has a tub of Crest Mint Gel-looking grease. Obviously, there is a difference. Does it matter though? Is there a special "bike grease"? Will using the white grease ruin everything?