Why does oil leak from grease?
Greases are like oil soaked sponge and are meant to release oil at a certain rate, depending on the operating conditions. Theoretically, oil is not meant to be released during rest periods or during storage periods. However, in practice, a certain amount of oil does leak from the grease even during rest periods or during storage. As long as this leakage is not excessive, this can be considered normal. Generally, excessive separation of oil from the grease during storage, as indicated by a thick layer of oil on top of the grease, a sign that the grease has not been ‘cooked’ well, resulting in the oil not being fully retained by the grease. While removing grease from a pack, it is preferably not to remove grease only from the centre or one side alone, resulting in a massive `cavity’ existing in the centre or the side of the pack from which the grease has been removed. This is because a cavity of this sort results in the oil separating from the grease on the sides of the cavity and formin
