Grease is used where it is not practical or convenient to use oil. It is used in machinery that runs intermittently or is idle for extended periods of time.Grease is a semi-solid/solid material of dispersion of thickening agents in liquid lubricant. The thickener can be either soap or non-soap based, and the liquid lubricant can be a mineral or synthetic type. Additives are added to impart special properties. It is also recommended for components that are not easily accessible for lubrication, or those subjected to extreme temperature, pressure or shock loads.