Low oil pressure makes me nervous

I run a 15 / 50 full synthetic but it's so thin it's like mineral oil .
Just for info, there is a reason for this.... full synthetics have a much more stable viscosity over a wide temp range. The lower weight viscosity number is tested at 100F, so down at room temp, the standard oil has thickened up while the full synthetic has not and so that is why it seems thin and runny when you pour it. That seemingly 'runny' synthetic will actually be MORE viscous at 200F than a 50W standard oil will be at that high temp.