Oil is any neutral, nonpolar chemical substance that is a viscous liquid at ambient temperatures and is both hydrophobic. (immiscible with water, literally “water fearing”) and lipophilic (miscible with other oils, literally “fat loving”). Oils have a high carbon and hydrogen content and are usually flammable and slippery.
The general definition of oil includes classes of chemical compounds that may be otherwise unrelated in structure, properties, and uses. Oils may be animal, vegetable, or petrochemical in origin, and may be volatile or non-volatile. They use for food (e.g., oliveoil), fuel (e.g., heatingoil), medical purposes (e.g., mineraloil), lubrication (e.g. motoroil), and the manufacture of many types of paints, plastics, and other materials. Specially prepare oils use in some religious ceremonies and ritluals as purifying agents.