All understood. Clamping force for oiled vs. dry vs. specially lubed threads (like ARP's) is all in the design of the tightening process. So there is really no universal answer.... regardless of any general document. I can find a general document from back in the day that says to use anti-seize on all head bolt threads.... Dry and clean yields a certain friction between the threads; oiled produces a different friction; each produces a given torque to clamping force relationship and are reported to be about 25% different.