Just another thought Pete. If you find a lot of flakes in the pan they could have been sucked up to the
oil suction pickup screen. They could block flow and drop to the bottom of the pan when motor is not running restoring
oil pressure when started again. Simplistic I know, the answer is inside that pan and by the way scrap the
oil cooler. Competent engine builders would never try to save a few bucks just to see a new motor trashed. And just consider the small additional cost of racing oil as insurance. I once thought that high end name brand synthetics were the way to go but the EPA has forced the petroleum industry to remove most of the anti wear additives in the last few years. Just some ideas to ponder.