Pronunciation: [ɡˈas ˈɔ͡ɪl] (IPA) 
The spelling of "gas oil" can be confusing because the pronunciation of each word differs from the way it is spelled. "Gas" is pronounced with a soft "g" sound, like "jazz", while "oil" is pronounced with a long "oy" sound, like "royal". When combined, the "s" in "gas" and "o" in "oil" blend together to create the sound of "soi" (sɔɪl) in the middle of the word. Overall, the phonetic transcription of "gas oil" is /ɡæs ɔɪl/.
Gas oil refers to a type of fuel that is derived from crude oil through a refining process known as distillation. Also known as diesel oil, gas oil is a relatively heavy liquid fuel that is commonly used in diesel engines and household heating systems. It is a middle distillate fuel, falling between gasoline and heavy fuel oil in terms of its properties and uses.
Gas oil is produced by refining crude oil, which involves heating and separating the various components based on their boiling points. Gasoline, jet fuel, kerosene, and gas oil are some of the products obtained through this refining process. Gas oil typically has a higher boiling point range and a lower viscosity compared to some other petroleum products.
Due to its specific properties, gas oil is primarily used as a fuel for diesel engines, including those in trucks, buses, locomotives, and some cars. It is also commonly used for heating applications in commercial and residential buildings, making it a versatile fuel source.
Additionally, gas oil serves as a vital feedstock for various industries, including petrochemicals, where it is used as a raw material for the production of plastics, synthetic fibers, and other chemical products.
Overall, gas oil is an important fuel that plays a significant role in transportation, heating, and industrial sectors, contributing to the global energy supply.
The word "gas oil" has its roots in the early 19th century. The term "gas" in this context refers to a substance produced through the distillation of coal, known as coal gas. During the 19th century, coal gas was widely used for lighting, heating, and cooking.
The term "oil" is used to describe a liquid fuel derived from petroleum or crude oil. In the early days of the petroleum industry, crude oil was distilled to produce various fractions, including a heavier, less volatile liquid known as gas oil.
Over time, the term "gas oil" became commonly used to refer to this particular fuel, especially in the context of industrial applications or diesel fuel. It is important to note that the term "gas oil" may have different meanings in various regions or industries.
