The vapors of unleaded gas can catch on fire if near a spark. This isn't as big as a problem as it has been in the past because most gas pump handles have vapor catchers. AnswerParty
Petroleum products are useful materials derived from crude oil (petroleum) as it is processed in oil refineries. Unlike petrochemicals, which are a collection of well-defined usually pure chemical compounds, petroleum products are complex mixtures. The majority of petroleum is converted to petroleum products, which includes several classes of fuels.
According to the composition of the crude oil and depending on the demands of the market, refineries can produce different shares of petroleum products. The largest share of oil products is used as "energy carriers", i.e. various grades of fuel oil and gasoline. These fuels include or can be blended to give gasoline, jet fuel, diesel fuel, heating oil, and heavier fuel oils. Heavier (less volatile) fractions can also be used to produce asphalt, tar, paraffin wax, lubricating and other heavy oils. Refineries also produce other chemicals, some of which are used in chemical processes to produce plastics and other useful materials. Since petroleum often contains a few percent sulfur-containing molecules, elemental sulfur is also often produced as a petroleum product. Carbon, in the form of petroleum coke, and hydrogen may also be produced as petroleum products. The hydrogen produced is often used as an intermediate product for other oil refinery processes such as hydrocracking and hydrodesulfurization.
Soft matter is a subfield of condensed matter comprising a variety of physical states that are easily deformed by thermal stresses or thermal fluctuations. They include liquids, colloids, polymers, foams, gels, granular materials, and a number of biological materials. These materials share an important common feature in that predominant physical behaviors occur at an energy scale comparable with room temperature thermal energy. At these temperatures, quantum aspects are generally unimportant. Pierre-Gilles de Gennes, who has been called the "founding father of soft matter," received the Nobel Prize in physics in 1991 for discovering that the order parameter from simple thermodynamic systems can be applied to the more complex cases found in soft matter, in particular, to the behaviors of liquid crystals and polymers.
A filling station, fuelling station, garage, gasbar (Canada), gas station (United States and Canada), petrol bunk or petrol pump (India), petrol garage, petrol station (Australia, Hong Kong, Ireland, Malaysia, New Zealand, Singapore, South Africa and United Kingdom), service station (Australia, United Kingdom and United States), or servo (Australia), is a facility which sells fuel and usually lubricants for motor vehicles. The most common fuels sold today are gasoline (gasoline or gas in the U.S. and Canada, typically petrol elsewhere), diesel fuel, and electric energy. Filling stations that sell only electric energy are also known as charging stations.
Fuel dispensers are used to pump petrol/gasoline, diesel, CNG, CGH2, HCNG, LPG, LH2, ethanol fuel, biofuels like biodiesel, kerosene, or other types of fuel into vehicles and calculate the financial cost of the fuel transferred to the vehicle. Fuel dispensers are also known as bowsers (in some parts of Australia), petrol pumps (in most Commonwealth countries) or gas pumps (in North America).
Octane rating or octane number is a standard measure of the performance of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating. In broad terms, fuels with a higher octane rating are used in high-compression engines that generally have higher performance. In contrast, fuels with lower octane numbers (but higher cetane numbers) are ideal for diesel engines. Use of gasoline with lower octane numbers may lead to the problem of engine knocking.
Gasoline //, or petrol //, is a transparent, petroleum-derived oil 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. Some gasolines also contain ethanol as an alternative fuel. In North America, the term gasoline is often shortened in colloquial usage to gas, despite the ambiguity created by the latter term's scientific association with non-liquids in gaseous form. This requires petroleum fuel in a gaseous state to be referred to as natural gas to avoid confusion with liquid "gas". Elsewhere petrol is the common name in the UK, Republic of Ireland, Australia and in most of the other Commonwealth countries. Under normal conditions, its physical state is a liquid, and its petroleum-derived name avoids confusion with liquefied petroleum gas or natural gas.