As the VAG engines seemed to have MAF`s fail it was decided that Pipercross filters was non oiled
You could oil it IF you wanted , but I can remember having one in my Fabia , one in my fella`s Octy one for my dad`s Ford , even that was non oiled
I raced motocross for a few years... diffrent strokes.
I can see where you are coming from though. But in that case I would recommend using the standard paper element filter unless the extra 30% airflow is required by some tune up details. The unoiled open cell foam filter will allow fine dust through. Enough to kill a motocross engine in 2or 3 laps on a hot summers day.