Thanks for all the replies! The second guy who told me recently that that's what they use is a volunteer in a bike coop and that's where we were when he told me! I was quite surprised as he fixes up a lot of the donated bikes. I didn't know WD 40 now makes bike specific lube. I don't believe that's what he was referring to - I'm pretty sure I saw the familiar blue can in his hand when he said it. For cleaning chains, when I used to, I would buy whatever a country had when I was in it (touring). Mineral spirits here, white gas sometimes in other countries and other stuff. Didn't know I could use WD40. Good to know. Thanks again.