Your Fuel Efficiency Questions Answered! (Sort Of)

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So how fuel efficient are modern passenger cars? Stuart Staniford passes along a link to the latest EPA mileage report, which both clarifies things and adds a bit to the murk.

First the clarification. Table 1 in the report provides an “adjusted composite” figure of 25.8 mpg for model year 2010 cars. This number is production weighted, so it reflects the actual distribution of cars sold.

But wait! For the past decade the EPA report has published “adjusted” — i.e., real world — numbers because the “laboratory” EPA mileage, which is the number you see on a car’s sticker, is notoriously over-optimistic. For 2010, the average laboratory 55/45 combined mileage was 32.7, which kinda sorta explains the BTS figure of 33.7 from the previous post. Close enough for government work, anyway. (Though this still sounds pretty high to me. It’s based on average city mileage of 27.6 and average highway mileage of 42.3, but according to DOE’s search site, there were a grand total of eight cars in 2010 that got lab EPA highway mileage over 42 mpg. So it’s hardly credible that the fleet highway average was 42.3 even using the lab EPA values.)

So I’m still a little confused. Still, if you’re looking for a real-world, production weighted fleet average for gas mileage, the best current estimate is 25.8 mpg for model year 2010. Now you know.

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

Truth #4: When we go to work, we're in the fight.

Truth #5: It's about minority rule.

Truth #6: The only thing that can save us is…us.

Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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