2000 4.4 with 125K. Sometimes, not always, I get a lot of clackity-clack lifter noise on cold start-up. My indy says don't worry, it's just the oil pick-up delay. My Hungarian mechanic friend says it's because my indy used a non-OEM oil filter last change which does not have the little gizmo that prevents all of the oil from draining down into the lower pan. Opinions on who is correct?