WIX makes all of NAPA's oil filters
Champion Filters (not connected with Champion Spark Plugs)
To my understanding Motomaster Filters are re-branded Fram Filters made by Honeywell which are not so good.Try this Wix Filter 51348 it's a Superior Filterhttp://www.wixfilters.com/filterlookup/PartDetail.asp?Part=51348
Ashland makes the oil to Kubota spec
Champion
Purolator
hastings
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.
Champion Labs.
Champion
infinity fx35
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.