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Cleaner new model cars show major emission reductions
Champion Spark Plug Company reports phase one results from a survey of 1,667 vehicles in the United States and Canada. New model cars emit 70 percent fewer pollutants than pre 1968 models, with 1970 to 1974 cars 30 to 50 percent lower. Tune ups cut CO by 30 percent at idle and HC by 70 percent at 55 mph, while fuel economy improved by about 5 percent on untuned cars after tuning.
MENTIONED IN THIS ARTICLE
United States
Canada
Champion
Champion Spark Plug Company
David L. Walker
Automotive Technical Services Department
Mr. Walker
Mobile Proving Ground
M.P.G