Diesel fuel, commonly referred to as the fuel that powers our automobile industry, is critical to the growth of the global economy. Diesel and its various components are an important part of powering our trucks, cargo planes, ships, agricultural and construction equipment, industrial machinery, automobiles, home heating systems, automobiles soldiers and the list goes on. Increasing food supply by oversupplying the market creates a ripple effect on the economy, making inflation worse and raising prices even higher. Rudolf Diesel, a German inventor and engineer, patented the first Diesel in 1892 as a diesel distillate for cars with compression ignition engines. The gasoline is lighter and heavier than regular gasoline, delivering more power and more per gallon, which is important for engines that need power rather than performance. It is also less flammable than gas and evaporates much more slowly. Since diesel fuel is so important to the world economy, why is the price of diesel fuel as high as regular gasoline? The answer comes down to three main factors: supply and demand, manufacturing, and taxation. The United States is still heavily dependent on gasoline, with more than 90% of American cars running on gasoline, but other countries continue to consume more diesel. European cars continue to use diesel-powered vehicles. Developing countries and high growth countries such as China and India have imposed huge demand for commercial diesel fuel. When the economy grows, the demand for goods and services increases, which increases the demand for diesel trucks and machines. As we move into the winter months ahead, demand for diesel also increases due to home heating systems, an expected seasonal change. On the supply side, one barrel of refined oil produces about 40% less diesel than gasoline. While the United States imports petroleum, most of the diesel we consume is refined right here within our borders. Before 2004, diesel was cheaper, but at the same time cheaper than gasoline. Manufacturing or refining diesel products has become more expensive since 2006, when the US EPA began the transition to Ultra Low Sulfur Diesel (ULSD). This decision was made because of the amount of sulfur in the air, which is killing us and the environment. The sulfur content of diesel fuel must be 15 parts per million and reduce sulfur emissions from combustion by more than 90%. The decision, however, produces fuel with a lower power density, reducing fuel economy for diesel engines and increasing productivity for manufacturers. Since 1993, the gasoline excise tax has imposed surcharges of 18.3 cents on gasoline and 24.3 cents on diesel. These tax revenues support the Highway Trust Fund, which helps maintain and maintain our highways. Petrol and diesel fuel taxes follow the same pattern but vary from state to state. In the Commonwealth of Pennsylvania, 57.6 cents per gallon is added to gasoline sales and 74.1 cents to diesel. The high difference for diesel tax is largely due to carbon emissions, a difference that has closed recently due to the advent of selective energy reduction systems and the use of diesel fuel in make a new diesel engine. Higher diesel taxes can also contribute to higher wear and tear rates produced by larger diesel vehicles. These three factors have the most impact on diesel prices, but the current geopolitical situation, sub-par refining capacity and energy needs after Covid-19 have reduced global oil supply and pushed prices higher. Many other factors, though less important, also contribute to the increase in diesel prices. The companies themselves often sell diesel products at a higher profit margin than regular gasoline products, while offering a large profit to the large ships that transport the product. It is during these times that small cargo ships need to be mindful of their fuel expenses. Taking the time to analyze fuel costs and how you buy fuel can be critical to making a profitable business.