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Diesel Fuel (Gas Oil) – Heavy Petroleum Product for Industrial and Transportation Use
Diesel fuel, also known as gas oil, is a relatively heavy petroleum product derived from crude oil through the distillation process, typically obtained after kerosene. It is produced in both atmospheric and vacuum distillation towers, as well as in refinery units such as cracking, hydrocracking, and coking, which convert heavy petroleum cuts into valuable diesel fuel alongside gasoline.
Diesel is generally a colorless liquid but is often tinted brown to distinguish it from other petroleum products. It consists of hydrocarbons with molecular chains usually containing 14 to 20 carbon atoms, sometimes up to 25.
Key Applications of Diesel Fuel
The primary use of diesel fuel is in diesel engines, heating installations, and industrial facilities. Diesel engines operate at higher compression ratios than gasoline engines, enabling greater power output and efficiency. This makes diesel the preferred fuel for heavy-duty vehicles and machinery that require robust power and long-lasting performance.
Diesel fuel is also widely used in power generation, industrial plants, hospitals, large buildings, institutional facilities, and transportation sectors.
Differences Between Diesel and Gasoline
Density & Composition: Diesel is denser and has larger hydrocarbon molecules (C14H30) compared to gasoline (C9H20).
Odor & Texture: Diesel is oilier and has a distinct smell different from gasoline.
Fuel Stations: Diesel pumps are clearly marked; diesel containers are yellow, gasoline containers are red.
Refining & Emissions: Diesel requires less refining but produces approximately 13% more CO2 due to higher carbon content.
Boiling Point Range: Diesel boils between 37°C to 450°C, gasoline between 20°C to 150°C.
Fuel Consumption: Gasoline vehicles usually consume less fuel per 100 km compared to diesel vehicles.
Diesel in Transportation
Diesel fuel powers most heavy vehicles such as trucks, buses, trailers, and construction machinery due to the high torque and efficiency of diesel engines. Additionally, diesel is the main fuel for diesel-powered ships and trains, especially in marine transportation where energy demand is high.
Types of Diesel Fuel
Conventional Diesel: Common worldwide, derived from crude oil, containing sulfur and aromatic compounds.
Synthetic Diesel: Produced from natural gas, coal, or biomass; includes high-purity Fischer–Tropsch diesel with low sulfur and stable engine performance.
Biodiesel: A renewable biofuel made from vegetable oils or animal fats, used pure or blended with diesel; reduces greenhouse gas emissions.
Freezing Point and Solubility
Diesel freezes typically between -8°C and -15°C. Due to diesel’s nonpolar nature, water does not dissolve in it.
Diesel fuel is denser and less volatile than gasoline, with a higher cetane number and lower octane rating. This allows diesel engines to produce more torque and operate more efficiently with lower fuel consumption.
Diesel is widely used in transportation, marine shipping, power generation, construction, mining, and agriculture due to its high energy density and reliability.
All diesel products supplied by Mazdaco Trading comply with EN 590, ISO 8217, and other international quality specifications, ensuring consistent purity and performance.
Yes. Mazdaco provides bulk diesel exports and long-term fuel supply contracts with global shipping and complete export documentation.
EN 590 Diesel – standard automotive diesel for transportation
Marine Diesel (MDO / MGO) – for vessels and offshore applications
Industrial Diesel – for power plants and heavy machinery
Biodiesel (B5–B20) – renewable, eco-friendly fuel blend
