Actually, Howie may be on to something. One of the things that can occur with dino droppings is thickening at high temps. When us car folks were dealing with new emission systems and hotter running engines back in the 70's, we had failures where the oil was like jello when we pulled the pan. The auto makers came up with new motor oil requirements to control this thickening, which the oil industry met with different additive packages, but the natural tendency of dino oil is to thicken when over cooked. I figure all you need to do is find some SD or SE rated oil (SF is when they added the anti-thickening agents) and as it starts to thicken up you won't notice that drop in oil pressure. Well, at least until the engine locks up and quits running.
FTWT - SF (F@*k The Wives Tales - Synthetic Forever)
Jerry