Regulation of Fuels and Fuel Additives: Certification Standards for Deposit Control Gasoline Additives

This action establishes a certification program for detergent additives used to control the formation of port fuel injector deposits (PFID) and intake valve deposits (IVD) in gasoline engines. In accordance with Clean Air Act section 211(l), an interim detergent program has been in effect since January 1, 1995, requiring the use of detergents in virtually all gasoline used in the U.S. This final rule contains standardized test procedures and performance standards to ensure that such detergent gasoline will provide an effective level of protection against PFID and IVD. The regulations include a variety of certification options and compliance alternatives, affording cost- effective flexibility to regulated parties. The effective control of deposits in gasoline engine and fuel supply systems has been shown to reduce the emission of nitrogen oxides, hydrocarbons, and carbon monoxide in engine exhaust, while enhancing fuel economy. Accordingly, the intent of the detergent certification program is to help achieve the primary public health and environmental protection goals of the Clean Air Act.