54.5 miles per gallon. That is the target fuel efficiency for all light-duty vehicles by model year 2025. Yet if you’ve gone car shopping lately, you’ve noticed that the combined mpg is nowhere near that target. The average fuel economy of all new cars sold was 25.6 mpg as of July 2014.
That’s a huge gap. While average fuel economy continues to improve, the target benchmark seems impossible to reach.
That’s because we’re looking at two different measurements of fuel economy.
The lofty 54.5 mpg target that is commonly understood and reported by media is the UNADJUSTED value. The real number we see on window stickers and that are reported by our fuel gauges is the ADJUSTED...