The local NAPA store here sells to the public the Proselect NAPA Masterpack line of oil filters for just under $2.50 including sales tax (8% here). The two I buy are the 21334 for a 06 Elantra 2.2 L, and a 51515 for a 94 F 150 4.9L. These are the ones that come a dozen to a cardboard box and do not come in an individual paper box, they are just shrink wrapped in plastic. Carquest/advance auto parts also carries the Masterpacks, but only sells them to the local garages, they will not sell them to a walk in off the street customer, at least not the store in my area. They are all made by Wix as I understand.