Comparisons of Exhaust Emissions and Fuel Consumption Characteristics- 1974 and 1975 California Automobiles

Exhaust emission and fuel consumption data for 1974 and 1975 California automobiles were generated using the EPA Federal Test Procedure. Fuel consumption data were also generated from a highway cycle test and in-service vehicle fleet records.

Emission test results indicate the degree of control achieved when compared to previous model year automobiles. Fuel consumption data comparisons were made among published data, data calculated using the indirect approved method, a direct method, and in-service fleet vehicle records.

Conclusions discuss emission reductions achieved and the cost of future reductions. Further research to investigate fuel consumption measurement methods is suggested.