Not too much oil or you will have a lot of problems, MAF sensors hate oil. Oiled gauze filters are more trouble than they are worth, I'd rather just buy new paper filters than wash, dry and oil an old one. They are not good filters either, they let a lot more dirt through than paper.
Are they just cone filters or are they for a specific application? If they are just universal cones and you got them cheap, take them to an import show and make some money, the Honda guys just love them for their hot air intakes.
The very existence of flame-throwers proves that some time, somewhere, someone said to themselves, You know, I want to set those people over there on fire, but I'm just not close enough to get the job done. -George Carlin