I've already contributed to this thread but I also agree with a reply from Gavin.

This is not an engine laboratory, accuracy in a gauge is over rated. If my oil pressure shows the difference between 0, low, med and I'm still cold, take it easy. It's good enough.

Think of what is going on under the hood of a Hellcat. Would installing a nylon hose from the engines oil gallery to a mechanical gauge inside the car be necessary? NO