[Alan Roehrich]

Also, I've seen some engines that lost oil pressure several seconds into a hard run. It actually turned out to be a problem with windage that was exacerbated by pressure in the crankcase. If your ring package isn't sealed up dead tight (ignore a leak down test, the correct test is a running blow by test with a Dwyer style air flow guage hooked to the crankcase vent at WOT and max RPM), you get pressure in the crankcase, and the windage from the rotating assembly will literally blow the oil up the sides of the pan. You can cure it with some sort of windage tray, but the real cure is to seal the ring package up better.