Emissions testing Wikipedia about 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, lubrication, and the manufacture of paints, plastics, and other materials. Specially prepared oils are used in some religious ceremonies as purifying agents.
Źródło: https://en.wikipedia.org/wiki/Oil
Wikipedia about organic type of oil
Organic oils are produced in remarkable diversity by plants, animals, and other organisms through natural metabolic processes. Lipid is the scientific term for the fatty acids, steroids and similar chemicals often found in the oils produced by living things, while oil refers to an overall mixture of chemicals. Organic oils may also contain chemicals other than lipids, including proteins, waxes (class of compounds with oil-like properties that are solid at common temperatures) and alkaloids.
Lipids can be classified by the way that they are made by an organism, their chemical structure and their limited solubility in water compared to oils. They have a high carbon and hydrogen content and are considerably lacking in oxygen compared to other organic compounds and minerals; they tend to be relatively nonpolar molecules, but may include both polar and nonpolar regions as in the case of phospholipids and steroids.
Źródło: https://en.wikipedia.org/wiki/Oil
Cheap motor oils
The possibility of buying a used car makes even the less wealthy can enjoy the benefits of this mode of transport. Just remember that buying a used car requires the driver to have a good knowledge of cars that will be needed for this, that has not been cheated. Therefore it is worth, before signing a contract to buy a car ride with him to the site, where you can seek a professional opinion about its condition. A used car can also be cheaper to operate because it will be reduced to its used parts, and buy cheap motor oil. We only need to pay close attention to their quality and not to buy the car parts excessively cheap.