The Napa Platinum filter is supposed to be a Wix or made by Wix?
My mechanic recommends them to me.
Also an interesting observation. I have a 6.2L Ford V-8 and ran it on Amsoil for the first 40K miles. It used some oil between changes of 7500 miles, about a quart. I took it to the dealership about the oil usage and they changed it to the Motorcraft synthetic blend that was recommended by them for the motor. It immediately stopped using oil.
I don't know if the rings coincidentally got broken in properly at that time or if the Amsoil is just so "skinny" that it used a lot.
