Which method is primarily used to assess fuel quality?

Laboratory analysis is the primary method used to assess fuel quality because it provides a comprehensive and detailed examination of the fuel's chemical composition, physical properties, and contaminants. This analysis allows for accurate measurements of various key parameters such as octane or cetane ratings, density, humidity, and the presence of impurities like water and particulate matter.

Laboratory testing employs sophisticated equipment and standardized methods to ensure that the assessment is reliable and can meet regulatory standards. This scientific approach makes it possible to detect subtle variations in fuel quality that could affect engine performance or emissions, which is critical for maintaining the integrity of fuel supplies and compliance with environmental regulations.

Other methods, like visual inspection or field testing with meters, may provide valuable initial indications of fuel quality, but they lack the precision and reliability offered by laboratory analysis. Similarly, customer feedback may highlight issues with fuel performance but doesn't provide the quantitative data required for thorough quality assessment.