If you did a poll, I bet it would be a 50/50 thing.
Uh, just don't let SWMBO catch you going over an oily filter with her best rolling pin...My X530 says no oil but I remember needing it for the 176 and 280. If it is done right you get no oil on the paper. After you oil it put it between some paper towels and go over it with a rolling pin or PVC pipe until you get all the excess oil out. Ther will be very little oil left in there, barely enough to leave a film on your fingers after touching it.