Is Oil Polar or Nonpolar?

Answer: Oil is typically nonpolar due to it containing many nonpolar covalent C-H (carbon-hydrogen) and C-C (carbon-carbon) bonds. These are often arranged in long chains which exhibit nonpolar characteristics. 

There are a great variety of different kinds of oils since it includes any nonpolar molecule that is a viscous liquid at Standard Temperature and Pressure (STP). Organic oils found in different biological organisms are typically called lipids. Mineral oils which form petrochemicals (i.e. the oil from the ground) are the second main type. Mineral oils actually result from the fossilized remains of organisms. Oil has been a staple of human life in different forms for many millennia.

To learn more about the polarity of a specific kind of oil named benzene (i.e. characterized by a carbon ring), please navigate to the following url:

Different Kinds of Oils
Different Kinds of Oils. Source
How is oil utilized in the real world?

Since oil encompasses a whole class of different molecules, there are a wide variety of uses including in cooking, cosmetics, energy and painting. The specific structures that are found in each of these applications vary depending on the specific purpose. Longer hydrocarbons typically store a large amount of energy which makes it either an optimal source of fats (typically unsaturated if still in liquid form) or energy for car fuel.