ASTM D-4814 (Standard Specification for Automotive Spark-Ignition Engine Fuel)

ASTM D-4814 is a standard that outlines the quality specifications for gasoline used in spark-ignition engines, such as those in most cars. It provides guidelines for various properties of fuel, including octane rating, volatility, and contaminant levels, ensuring that the gasoline performs well, burns efficiently, and meets environmental regulations. Following this standard helps ensure safety, engine performance, and fuel economy, while also reducing emissions. Overall, ASTM D-4814 plays a crucial role in maintaining the quality and compatibility of fuels with modern engines.