Snobelt ~
Tri-Flow is a popular favorite by many including myself. You can get it in the can or the tube. Local hardware store is where I got this can. My LHS carries the tube stuff. I get good results with some gun-oil to... You don't want to use any lubricant that will attract dirt however, or you'll cause worse damage by more friction from the dirt particles. I've used silicone before from my RC-Car stuff, and that stuff did exactly that. It wore the parts quicker. It's a good habit to periodically clean all your lubed bearings and parts, and re-apply fresh oil from time to time.
Hope this helps,
~ Jeff