Oil is not typically referred to as "liquid shine." While oil can be shiny, this is not a common or widespread phrase used to describe it.

The phrase "liquid shine" might be used in a poetic or metaphorical context, describing the way oil reflects light, or its ability to enhance the appearance of surfaces. However, it's not a standard term in technical or everyday language.

Here's why oil might appear shiny:

* Light reflection: Oil has a high refractive index, meaning it bends light significantly. This bending causes light to reflect off the surface of the oil, creating a shiny appearance.

* Thin films: When oil forms thin films on surfaces, like water, the thin layer can create iridescent colors due to interference of light waves. This contributes to a shimmering or shiny appearance.

While "liquid shine" may not be a common phrase, it's understandable why someone might use it to describe the visual effect of oil.