I had been meaning to post about this question for a while. I run Rotella 15W40 in my 261, and noticed that at hot low idle ~500 rpms, the oil pressure drops to about 15psi. Give it gas to a fast idle and then start accelerating, and it jumps right back up to 30psi. Good to know that is sufficient oil pressure. These 6's sure do purr at 450-500 rpms.
