This SAE Recommended Practice summarizes the composition of modern automotive gasolines, the significance of their physical and chemical characteristics, and the pertinent test methods for defining or evaluating these properties.
Gasoline accounts for nearly half of all crude oil consumed in the U.S. The oil, automobile, and fuel additive industries have worked together for many decades to determine the composition and properties of gasoline required to provide satisfactory vehicle operation. This work is ongoing. Since the late 1960s, environmental concerns have led to federal and state regulations to reduce emissions from vehicles and from petroleum storage and transportation facilities.
This SAE Recommended Practice discusses the characteristics of gasoline, common test methods, specifications developed by ASTM International, government regulations, and the effects of gasoline composition and properties on vehicle performance, fuel economy, emissions, and durability.