Ought to not be used in autos that has a moist clutch/friction drives; the excellent lubricating Qualities of STP® Oil Treatment for Gearboxes would cut back the friction and cause the clutch to slip. STP® Oil Treatment for Gearboxes is made to lubricate tricky to reach parts which includes gearboxes, https://edgargalwf.mdkblog.com/39575324/gearbox-oil-treatment-an-overview