Air filter question?

I bought mine xp 4 1000 with 265 miles on it. I opened the air cleaner box. To my surprise theres a Maxx Airr filter in there no prefilter.
I washed it with degreaser. Should I oil it? I did get a prefilter.

Hct sells the Airaid
I thought Airaid you did not oil. They look exactly the same.

Should I just get rid of this thing? Go buy a stock paper filter? or go get the Airaid?
Out of time leave next wend for Glamis.