👉 A matching fluid, also known as a lubricant or lubricant oil, is a substance designed to reduce friction and wear between moving parts in mechanical systems. It achieves this by forming a thin film that separates surfaces, minimizing direct contact and thus preventing damage due to friction. Matching fluids are formulated with specific viscosities and additives tailored to the operating conditions of the machinery, such as temperature and load, ensuring optimal performance and longevity. Common applications include engines, gearboxes, and hydraulic systems, where they play a crucial role in maintaining efficiency and reducing maintenance needs.