That same 1/2" stud is only 90# with ARP paste, so that shows you how much more friction the oil creates. Remember, torque values are measuring a pre-determined friction, so the more friction, the higher torque value is needed to accomplish the same result. Usually on an aluminum head you reduce the torque value by approximately 5%, or in this case, 5# to make up for the expansion of the cylinder head under load, heat.