So what everyone wants to do is to torque the bolt up until it breaks then back it off a half turn.

This for general purposes has been done and the torque charts based on bolt grade gives a good starting point in order to clamp items togeather with suffient load to prevent stress fatigue in the clamping bolts. (ie a loose bolt will break).

Yes I did say lubrication can effect the clamping load. Now what type of lube; moly, oil, grease, lard or whatever and exactly how much and where placed (such as under the bolt head) will effect the clamp load at the same torque value. Is there a chart that tells what co-effient of friction changes depending on lube and of course on temperture and then correlates to the torque to be applied?

The charts are quite generous and include a safety factor to prevent the breakage of bolts. For me torquing bolts to upwards of 1500 ft-lbs works quite well without all the fuss of calculations. I really need to get my job done without spending time with a calculator to decide if my calculated torque is correct or not.