DESIGNING FUELS FOR THE ENVIRONMENT - REFORMULATED GASOLINE

The Clean Air Act of 1990 has impacted the gasoline markets of the Uni ted Stales. Additives and reformulated gasoline have already been impl emented in some cases to comply with regulations and emission standard s, and gasoline will continue to be reformulated The regulations for r eformulated gasoline have been divided into Phases I and II, starting in 1995 and 2000, respectively, the second phase having more stringent requirements. phase I is divided into two compliance models-Simple an d Complex. These models are designed to facilitate the determination o f fuel formulation compliance without the expense of extensive testing of motor performance. The Simple Model can be used from 1995 to 1997, and the Complex Model from 1997 on. Diesel fuels are also impacted by the Clean Air Act. Other programs-such as CO oxygenate and California Phase 2-have been initiated in response to air quality issues.