Has AC Delco, MC and Mopar parts 'always' been available from parts houses?
Or is this a recent thing? All three US makes haves 'their' brand of oil filters available at WM, among other places. Maybe they are reaching out to try to get the appropriate product to us without us having to visit the dealership.
Now, what about Mopar, Motorcraft and AC Delco branded air filters commonly available to us.......
Then, fuel filters!
Dunno though, as Fram, Purolator and Wix seem to be doing dine.....or maybe they make the car manufacturer's filters anyways.