Personally, I usually just:
a) remove the fan
b) carefully remove the label on the back
c) put in a couple of drops of oil
d) run it that way for a little while to let the oil 'dissipate' in
e) if more oil needed, goto c)
f) if no more oil needed continue
g) clean up all oily residue where the label will be
h) put the label back
i) put the fan back
As far as I concern this is less hassle than doing an RMA and I usually had very good success with.
Disclaimer: I do have an electronic assembler certificate, so I may be more skilled than an average Blow Joe, but there's nothing really earth shattering in the above process. Just be slow and careful.--
Wacky Races 2012!