Well i just opened it yesterday and it doesnt seem oiled. There's no oil smell and the filter is a completely dry yellow foam material. I wonder if it is meant to be used straight out of the box or if I have to pre-oil prior to use. I am currently under the impression I'm meant to use something like this:

http://cgi.ebay.com/ebaymotors/UNI-A...Q5fAccessories

But spoon makes no mention about any oiling. The only instructions are on the following sticker and it only discusses cleaning (according to my japanese translator mate):

http://sphotos.ak.fbcdn.net/hphotos-..._1164006_n.jpg