From the article:
Quote:
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Average fuel economy for cars sold in April was 25.2 mpg, down .2 mpg from March and down .6 mpg from the high point reached in August of 2014.
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And a graph from UMichigan
Per Gasbuddy, gas prices started plummeting... last August. The lowest point was in January, which closes matches UMichigan's low point of December (25.0mpg). That's a pretty strong correlation in my book.