Today, diesel engines are less noisy and perform as efficiently as their petrol counterparts by producing less smoke. This is because of the gradual improvements that manufacturers have made to the engines. The engines are cleaner and less noisy. They have particulate filters and traps that keep out most of the trash in the black smoke that they used to emit back in the day. However, the nature and chemical composition of diesel fuel put your engine at a risk of damage considering things like weather and the combustion process that occurs in the engine.