Chevrolet’s 1975 Efficiency System announced to boost fuel economy
Chevrolet unveils the 1975 Efficiency System with catalytic converters, High Energy Ignition, Early Fuel Evaporation and radial tires. The plan promises leaner running, lower maintenance, and cleaner emissions. The program targets improved fuel economy across V8 and six cylinder lines, with milestones leading to showroom availability on September 27.