The magazine here
http://www.machinerylubrication.com/...e%20Components has lots of great lubrication information related to cars. Since lubricants are somewhat mysterious to most of us or we think we know more than we really do, the machinerylubrication.com site is pretty good at explaining what really happens with the specifice types of lubricants.
I subscribe to this at work in print and thought the community might enjoy it as well.