This semi-fluid grease is ideal for the transmissions of certain vintage cars and for the gearboxes of motorbikes such as the Burman. This is typically used in vehicles up to 1918. Semi-fluid grease acts as a liquid where greases do not. If you use grease in a steering box or gearbox the centrifugal action of the internal components flings the grease away, causing it to stick to the casing where it cannot lubricate the components. Semi-fluid grease is able to drain down and pool in the casing enabling continued lubrication.