WIX makes all of NAPA's oil filters
I've been told by people who work for Fisher Auto Parts that the Federated oil is made by Amalie.
Champion Filters (not connected with Champion Spark Plugs)
Ashland makes the oil to Kubota spec
Champion
Purolator
I have been searching on the net and found out that WIX makes the carquest oil filters. If you look at the carquest oil filter box it will say Wix Filtration.
Made by Fram.
Champion
Champion Labs.
FRAM makes garbage oil filters, I cut one open and the inside was cardboard. I will only use pennzoil oil filters because It keeps the oil clean and they are very strong filters. The WIX filters are the best in my opinion.
Made in China !