For many years, Ethyl Corporation engineers have conducted research into engine operation at lean air-fuel ratios. They were interested in lean-mixture combustion because of the inherently low emissions and good fuel economy that are possible without catalytic aftertreatment with a properly controlled lean engine. Some of their recent research efforts have been directed toward a demonstration of the potential of lean-mixture control techniques to meet emissions standards. The EPA's Emission Control Technology Division (ECTD) tested on Ethyl lean burn car equipped with a Turbulent Flow Manifold (TFM). The system was installed on a BMW 2002. This vehicle met the 1975 Federal emission standards and gave excellent fuel economy. Ethyl has done similar work on full-sized vehicles. They have achieved significant reductions in emissions on these vehicles and one vehicle has completed mileage accumulation. ECTD requested a vehicle for testing. Ethyl Corporation provided a Dodge Coronet equipped with their TFM induction system and exhaust aftertreatment.