My 2015 CX5 has 176K I have dropped the pan at 50,00 mile intervals. New filter at 100k. OEM fluid, even at 14 bucks a quart!. It takes 4+ QTS. I have noticed no difference in performance. At 100k I serviced everything, QEM coolant, brake fluid flush, Plugs, All gear boxes with Amsoil fluids. I...