is there any other way besides blockage that could cause oil cooler to be the culprit.i just traded for a car that has a cooler and the oil pressure is about 20 at idle and 40 going down the road. way to low for me but the car dont rattle, knock etc. im planning on freshening her up this winter but i sure would like to drive her for now.anyway i cant think of anything in a coo;er that could cause that but blockage.