Poly, is right its an oil pan problem. I would not run it again until pan is fixed. You are starving your bearings of oil. Two things need to be addressed. You need baffles in your pan to trap the oil on exc. and on decel. Then a good windage tray that covers the entire pan top. with louvers for drain back. I've been there and lost a motor because of poor oil pan design. And know other guys who had the same problem. An extra quart of oil won't hurt anything either.