The article discusses the different types of fuel associated with vehicles, starting with petrol and diesel for cars and motorcycles, which is commonly recognized by most. It highlights an often-overlooked aspect of maritime transport — the type of fuel large ships use while navigating the seas. Due to their massive size and capacity to transport thousands of tons of goods and people, large vessels require a distinct type of fuel to operate efficiently.

In maritime transport, large ships primarily utilize Heavy Fuel Oil (HFO) or Bunker Fuel. This is not a clean and light fuel like petrol or diesel, but instead, it's a thick and heavy oil leftover from the refining process of crude oil. The refining removes lighter fuels such as petrol, diesel, kerosene, and jet fuel, leaving behind this denser residue which is more economical for operating large ships.

Understanding the type of fuel used in ships is crucial for several reasons, including the fuel's impact on environmental regulations, operational costs, and the efficiency of maritime transport. As the shipping industry faces increasing pressure to mitigate its carbon footprint, knowledge about fuel types and their implications could influence decisions related to sustainability and energy transitions within the industry.