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
The costs of car usage, which may include the cost of: acquiring the vehicle, repairs and auto maintenance, fuel, depreciation, driving time, parking fees, taxes, and insurance, are weighed against the cost of the alternatives, and the value of the benefits ? perceived and real ? of vehicle usage..
The benefits may include on-demand transportation, mobility, independence and convenience.
During the 1920s, cars had another benefit: "couples finally had a way to head off on unchaperoned dates, plus they had a private space to snuggle up close at the end of the night." Similarly the costs to society of encompassing car use, which may include those of: maintaining roads, land use, air pollution, road congestion, public health, health care, and of disposing of the vehicle at the end of its life, can be balanced against the value of the benefits to society that car use generates.
The societal benefits may include: economy benefits, such as job and wealth creation, of car production and maintenance, transportation provision, society wellbeing derived from leisure and travel opportunities, and revenue generation from the tax opportunities.The ability for humans to move flexibly from place to place has far-reaching implications for the nature of societies.Źródło: https://en.wikipedia.org/wiki/Car
Gasoline definitionGasoline "???s?li?n", also known as petrol "?p?tr?l" outside North America, is a transparent, petroleum-derived liquid that is used primarily as a fuel in internal combustion engines.It consists mostly of organic compounds obtained by the fractional distillation of petroleum, enhanced with a variety of additives. On average, a 42-gallon barrel of crude oil (159 L) yields about 19 US gallons (72 L) of gasoline when processed in an oil refinery, though this can and does vary based on the crude oil source's assay. The characteristic of a particular gasoline blend to resist igniting too early (which causes knocking and reduces efficiency in reciprocating engines) is measured by its octane rating.Gasoline is produced in several grades of octane rating.Tetraethyllead and other lead compounds are no longer used in most areas to regulate and increase octane-rating, but many other additives are put into gasoline to improve its chemical stability, control corrosiveness and provide fuel system 'cleaning,' and determine performance characteristics under intended use.
Sometimes, gasoline also contains ethanol as an alternative fuel, for economic or environmental reasons.Źródło: https://en.wikipedia.org/wiki/Gasoline