What is one major advantage of using a diesel engine over a petrol engine?

One significant advantage of using a diesel engine over a petrol engine is better fuel economy. Diesel engines are designed to be more fuel-efficient, primarily due to the higher energy content of diesel fuel and the way in which diesel engines operate. They utilize a higher compression ratio, which leads to a more efficient combustion process. This means that diesel engines can convert more of the energy in the fuel into usable power compared to petrol engines. As a result, vehicles with diesel engines typically achieve greater miles per gallon, leading to less frequent refueling and lower operating costs over time. This efficiency is particularly beneficial for applications that require heavy loads or frequent towing, making diesel engines a preferred choice in many truck and commercial vehicle scenarios.