To oil pc fans you can do the following: go to the supermarket (or get someone to go for you) you need bluetack and sewing machine oil. remove the fan from the eatsink or open the powersupply and remove the fan if possible. If there is a sticker remove it carefully; pour in a drop or two of sewing machine oil. use a ball of bluetack to remove the excess oil and restick the sticker down. If there is a rubber/plastic plug take it out and put the oil in then replace it. I kid you not; we do this all the time in Perth and a fan runs for a good 2 to 2 and a half years once oiled. Homebrand sewing machine oil will do; 68 cents a bottle, and bluetack at $2 or $3. Or buy new fans.