s80 t6 loss of oil pressure while driving
 

This car has me stummped. It has great oil pressure at idle and when u first start driving the vehicle. As u r driving the oil pressure dropps. U shut the car off and start it u have good oil pressure again. The oil is new and clean. No trash in the pan. It is acting like the screen in the pan is sucking trash up and losing oil pressure but after taking the boreascope anl looking in the pan there is no trash. I am tring to figure out if it is the o rings in the pan leaking or what it is. Any ideas. It does set the message in the car for no oil pressure.