2001 Subaru Outback L.L. Bean 6 Cyl 3.0L
Small patch of motor oil on top of air filter
Is that from a gasket leak
Usually, the oil patch is due to the PCV system and small filter located inside the air cleaner box - being saturated with oil. Simply replace the small PCV breather filter foam piece (usually less than $2.00) with a new one.