Which Fram Oil Filter.

Oil filters are made for the OEM by the outside supplier who will be the cheapest and meet the OEM's specs for an oil filter. I spent 42 years in engine plants (non Chrysler) and we would see supplier changes on oil filers every year or two. And it was all based on the cost from the supplier. If Brand "A" can make the filter to spec if $0.015 cents less than Brand "B", they'll get the contract to supply.

It's like everything else in this world: Follow the money.