It does seem to favor synthetic media over paper though.
There isn't an oil filter made today anywhere that is just "paper" only. They wouldn't last.
Let's say all cellulose oil filters contain <5% synthetic media blend.
Can you market them as "Synthetic blend" media? Why or why not?
It's why I have never spent an extra $2 a quart for "Synthetic blend" oil...
you don't know if it is 50% blend or 5% blend
All 0W-20 oil is a synthetic blend, but often/usually isn't marketed as such.