What is the purpose of a fuel additive?

The purpose of a fuel additive is to enhance fuel performance and stability. Fuel additives are chemical compounds that are mixed with fuel to improve its properties and performance when used in engines or other systems. They can serve various functions, such as cleaning the fuel system, stabilizing the fuel against degradation, improving combustion efficiency, and preventing the formation of deposits and varnish.

Enhancing fuel performance often involves increasing the octane rating, which allows for better engine performance and efficiency, as well as reducing harmful emissions. Stability is crucial, especially for fuels that may be stored for long periods, as additives can prevent the fuel from breaking down and forming sediments that could impede engine operation. Overall, additives play a vital role in ensuring that fuel maintains its quality and function over time, making option B the correct choice.