I’ve noticed that after leaving the car for about 4-5 days it takes a couple of seconds for oil pressure to build. I can only assume the oil is draining back into the sump and the pump is taking a while to get it up again. I know there’s the ‘weir’ as Rover calls it that allows the pump to self prime. But has anyone come up with a way to help reduce the pressure build time after a week’s layup? Main and rod bearings are brand new, pressure is excellent when started and remains so. Oil filter has an anti drain valve as it should also.