My chain is new and my chainring is old(er). I haven't used it much at all, but my bike has had at least one other owner. I suppose that could be part of the problem. I'm not sure what lube I'm using (I forget the name now), but it's something new as well. The noise got worse after a 20 mile ride tonight and I'm think the new lube might be part of the issue. It's very thin, unlike the stuff I've used in the past.

Does it sound logical that the new chain with old chainring is the cause of the noise and thicker lubes help reduce it?