Oil

An 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 are used for food, fuel, light, lubrication, and the manufacture of paints, plastics, and other materials. Specially prepared oils are used in some religious ceremonies as purifying agents.

Perhaps the most known oils Unionwide are olive oil (used for food) and petroleum (lubrication and chemical feedstock). However TL1 or lower and primitive culture types also use petroleum as an fuel. Most of these cultures use whatever type is available, e.g. Tyranno Fin Oil is commonly used on Nilfeheim for food, fuel and lighting.