For a squeeling fan motor I just drill a small hole into the bearing hump on both ends of the shaft and librally squirt some 30W in the holes. Inside there is a small piece of felt that holds the oil for the bearings.. It has worked everytime for me.. Hold the motor in the upright position before drilling the holes and drill on the topside if possible..
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

professional bovine relocation specialist