...when it was brand new and I left the manufacturer's lube on it and rode it on a crushed rock trail. That lube was a dust magnet. I've seen threads where people say the lube that comes on a new chain is the best there is. I've read chain threads that say don't use a wet lube because it attracts dust. I use either 30W or ATF diluted with mineral spirits and both seemed to work better than what was on it when I bought it.
On another note, has anybody ever tried dry moly spray lube?