... automobile lubricating systen, which it is si Lubricating oil system of engine cleanerTechnical parameterAir pressure : 0-100 psl weight :24 ... the vacuum by this machine,and guarantee that the passage of the lubricating oil is unlocked, the pressure is normail, ... and then improve mechanical movement efficiency,resume perfor-mance of the engine, length engine service life. sell Lubricating oil ...