Question of the Month: How can I compare the energy content of alternative fuels and gasoline or diesel? What implications does this have for overall fuel and vehicle comparisons? 

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Following the introduction of the Nissan LEAF and Chevrolet Volt, the first full year of sales for mass-market plug-in vehicles was 2011; nearly 18 thousand plug-in vehicles were sold that year in the United States. Sales of plug-in electric vehicles have grown nearly each year since, increasing nine-fold to a record high of about 160 thousand units in 2016. All-electric vehicles (EV) have outsold plug-in hybrid electric vehicles (PHEV) each of the past three years.

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Question of the Month: How is fuel economy determined and reported for alternative fuel vehicles?

Answer: Last month we learned about how the U.S. Environmental Protection Agency (EPA) determines and reports conventional light-duty vehicle fuel economy ratings. While alternative fuel vehicle (AFV) fuel economy testing is largely similar to that of conventional fuels, the EPA makes some adjustments to account for different vehicle technology and fuel energy content. By tailoring AFV fuel economy testing and reporting, the EPA is able to provide apples-to-apples comparisons and allow consumers to make informed decisions. 

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