Paraffin impregnation into the internal pore structure of porous 17-4PH was used as a lubricant storage. Porous 17-4PH specimens were fabricated by metal injection molding (MIM) combined with powder space holder (PSH) technique for samples with three different porosities. Sodium chloride was used as a space holder material. Paraffin impregnation was achieved by immersing the 17-4PH specimens into melted paraffin wax. Dynamic coefficient of friction (COF) of porous and non-porous specimens was measured in dry sliding and paraffin-lubricated conditions. Significant COF reduction in paraffin-lubricated results was observed with the porous samples compared to the non-porous reference samples. The lowest COF value was observed for specimens with 20 and 30 wt% porosity.