I usually run Mobil-1 Syn 15w-50 w K/N filter and I recently changed (yesterday) to 5w-30 Mobil 1 syn. After the change my oil pressure (autometer) dropped more than 10psi's . Everything is the same..fill level..same type filter everything.. but the oil pressure is lower.. I think I might be swithching back to 15w-50.
Anyone have a detailed reasoning.

Eric