No, in fact very little oil is used. Unlike pneumatic nailers, the gas cordless tools only need a few drops of oil in a few specific areas during the assembly phase after a periodic cleaning. The fuel that is used to create the combustion for cycle is also lubricated so the tool receives small doses of lubricant with every cycle. Bostitch provides this lubricating oil in two sizes. Part # 9R192226 = 2/3 oz. bottle Part # 9B12147R = 4 oz. bottle.