What type of oil is indicated by orange color?

The indication of orange color in a particular type of oil is often associated with hydraulic oil. This color can be a result of additives used in hydraulic fluids to distinguish them from other types of oil and to indicate their specific applications. Hydraulic oil is used to transmit power in hydraulic machinery and systems, and its distinctive coloring helps to prevent confusion with other oils, which is critical for safety and proper maintenance.

In contrast, the other types of oil listed typically do not have a standard orange color associated with them. Lube oil, for example, may range from clear to various other colors but is not specifically identified by orange. Cooking oil usually exhibits a more golden or yellowish hue, and engine oil could vary widely depending on its formulation and condition but generally doesn't show orange as a primary color. Therefore, the identification of hydraulic oil by its orange color is supported by industry standards and practices that ensure clear visual differentiation between various oil types.