What is the Difference Between Lubricating Oil and Grease?

[LaIsaac]

Lubricating grease and lubricating oil mainly differ in composition, pressure resistance, and function. In terms of composition: Lubricating grease is paste-like, belonging to a relatively viscous semi-solid fat. It is made by adding thickeners to industrial oil. Lubricating oil is liquid, with strong fluidity and slightly higher volatility. In terms of pressure resistance: Lubricating grease has greater adsorption capacity on metal surfaces compared to lubricating oil and can form a more robust oil film, capable of withstanding higher working loads. This is due to the presence of a large amount of polar substances in the grease. Additionally, as a base grease, when polar additives are incorporated, it exhibits better receptivity than lubricating oil. In terms of function: Lubricating grease is often used on metal surfaces, serving to fill gaps and provide rust prevention. Lubricating oil is applied to various types of machinery, primarily functioning in lubrication, cooling, rust prevention, cleaning, sealing, and buffering.