EPA regulations require that each automobile manufacturer or importer of gasoline, diesel fuel, or a fuel economy additive have its product registered prior to its automobile introduction into commerce. In some cases, EPA requires testing of these automobile fuels and fuel additives for possible health effects. EPA also requires that gasoline contain a certified detergent in order to reduce fuel emissions. EPA issued standards in 1973 that called for a gradual phase-down of lead to reduce the automover health risks from lead fuel emissions from gasoline, culminating in the Clean Air Act Amendments of 1990 and EPA regulations banning lead in motor automobile parts automobile vehicle gasoline after 1995.
Beginning in 1989, EPA required gasoline to meet volatility standards to decrease evaporative emissions of gasoline fuels in the automover parts summer months when ozone levels are typically at their highest. In the early 1990s, EPA began monitoring the winter oxygenated automobile fuels program implemented by the states to help control fuel emissions of carbon monoxide during the winter months, and established the reformulated gasoline (RFG) program to reduce fuel emissions of smog-forming and toxic pollutants.
More recently, EPA promulgated new regulations automobile parts setting standards for gasoline fuels toxics performance levels and standards for low sulfur gasoline fuels to reduce harmful air pollution and help ensure the automobile effectiveness of advanced emission control technologies in automobile vehicles.
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