The composition of grease lubricants varies depending on the intended application. Thickening agents, commonly lithium, calcium, or aluminum soaps, are used to give grease its semi-solid consistency. These thickeners hold the lubricating oil in place, preventing it from flowing out under normal operating conditions. Additionally, various additives such as antioxidants, corrosion inhibitors, and extreme pressure agents are incorporated into grease formulations to enhance performance and extend equipment life.