How do I lubricate the SB-1664FN and how often should I do it?

Use Bostitch Air Tool Lubricant, Mobil Velocite #10, or equivalent, adding oil through the air line connection to lubricate internal parts. If no airline lubricator is used, add a few drops of oil into the air fitting on the tool once or twice a day. Do not use detergent oil or additives, as these will cause accelerated wear to the seals and bumpers.