I've been searching though old threads researching different topics and I have to admit, all of the references to grease and lube and oil and anti-seize and wd-40 and the lot confuse me. Like, I was reading that I want to grease threads, but not oil them. But, I thought that oiling and greasing a chain meant the same thing, so obviously I don't get it. Little help? Which, if any, of these are interchangeable and when? If grease and lube and oil are different things, what are their individual jobs? It'd be great if someone could just explain to me (as if I were a simpleton... I know, it's a stretch) what they are and what they do.