They're into oil samples, not much for testing oil filters....at least I think some types. If you've never sent them a sample for your motor oil, they don't know you from Joe schmo
Btw, mobil 1 oil filters, and mobil I synthetic motor oil were all I mainly used in my tundra for nearly 300k miles. They are good oil, and filters. I also used K&N oil filters that were equally as good at times. Most oil filters are good as long as you change your oil within a year. Some just do a better job over a longer period of time. I did 2 Blackstone oil samples during the time I had my tundra...both were nearly the same 100k miles apart. When I got to 200k miles I didn't bother wasting money what I already suspected nothing would change.