What property of grease describes its high temperature properties?

The property of grease that describes its high-temperature characteristics is the dropping point. This is the temperature at which the grease begins to lose its structure and flow, essentially indicating the maximum temperature at which the grease can be effectively used without undergoing significant changes. When grease is heated beyond its dropping point, it may begin to liquefy, leading to a decrease in its ability to provide proper lubrication, which can result in increased friction, wear, and potential failure of machinery components.

Other properties mentioned, such as pour point, stability point, and flow point, relate to different aspects of grease performance under thermal conditions. The pour point indicates the lowest temperature at which the grease can flow, while the stability point pertains to the grease's ability to maintain its properties over time and under various conditions. The flow point is often used to describe the temperature at which the grease becomes mobilized enough to flow under gravitational force. However, none of these specifically address the maximum thermal capability of the grease as effectively as the dropping point does.