What is the primary cause of fuel quality degradation?

Water contamination and microbial growth are primary contributors to fuel quality degradation due to their significant impact on the integrity and performance of fuel. When water is introduced into fuel, it can lead to several problems, such as corrosion of storage tanks and equipment, which can compromise the fuel. Moreover, water serves as a medium for microbial growth, particularly for bacteria and fungi. These microorganisms can multiply rapidly in the presence of water and organic matter found in the fuel, leading to the formation of sludge and other contaminants that can clog filters and harm engines.

Additionally, the presence of microbial growth can cause further quality degradation through the production of acids and other harmful byproducts during their life cycle, further affecting fuel usability and stability. Therefore, ensuring that fuel is kept free from water and microbial contamination is crucial for maintaining its quality and reliability.