[kyleb]

I would need to see the actual flow capacity vs pressure drop graph -- AND -- the data on the maximum size/ & qty of the dirt that passes thru the filter.

It has been my experience that quality paper elements filters out perform the oiled cotton filters by a wide margin.
Also, when I was using the oiled cotton filters - it didn't take very long before the dirt buildup significantly reduced the flow of air thru the filter.

However, your mileage may vary . . . .