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The EPA is mulling an investigation into whether raising the octane rating on standard gasoline might be the right move for the environment. A figure as high as 95 octane could be possible to make modern, downsized engines more efficient.

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Contrary to perception, the EPA hasn't ruled on mandating a 54.5-mpg fleet average for 2025. The EPA won't make a decision on it until 2018.

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It seems whatever can be burned to power a car, heat a home or make electricity, or ship people and goods is being sold at bargain basement prices.

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Tesla thinks that automakers should have no problem meeting the EPA's 54.5-mile-per-gallon CAFE standard for 2025. In fact the EV company, wants the regulation to be even tougher, if possible.

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Chevrolet has released the officials on the 2016 Volt, with the EPA listing the hybrid at 106 MPGe, 42 MPG combined, and with 53 miles of EV range.

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Senators Want The EPA To Up The Amount Of The Biofuel In The RFS

A group of 36 Senators are pushing for the Environmental Protection Agency to increase the proposed volume of biodiesel under the revised Renewable Fuel Standard.

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Automakers are looking for retroactive emissions credits from the EPA for using stop/start, LED lights, and other tech already added to vehicles.

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The Obama administration has proposed tough new fuel economy standards to improve fuel efficiency and reduce carbon dioxide pollution from trucks and vans.

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AAA Says Most Drivers Get Better Numbers Than Sticker Ratings

One in three drivers don't trust the fuel-economy numbers printed on window stickers of new cars are accurate. Those drivers have good reason to be skeptical.

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Mazda has announced EPA fuel economy figures for the new CX-3 subcompact crossover, besting anything else in its class with up to 35 miles per gallon on the highway.

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RFS Update Would Drop Ethanol Level By 4B Gallons This Year

A proposal from the Obama administration would lower the 2014 Renewable Fuels Standard level to the amount actually used last year, and goes up from there.

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The RFS Has Rules, But EPA Might Not Be Enforcing Them

A study from the University of Wisconsin-Madison finds that millions of acres of crops might be contributing to the country's ethanol supply, while being in violation of the rules under the Renewable Fuels Standard.

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The GAO says tens of millions of dollars are wasted each year due to too much fracking. 40 percent of the burnt excess gas could be saved.

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Settlement Reached Between Government Agency, Biofuel Producers

Two biofuel producers – AFI and AFPM – filed a lawsuit earlier this year to get the EPA to make a decision about the 2014 RFS. Today, the EPA said it will decide by the end of November, 2015.

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Six-Speed Transmission Helps Mazda Beat Out Honda, Hyundai Models

The next-generation Mazda2 will increase fuel economy by about 15 percent.

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An Illinois state representative proposes a $5,000 fine for any drivers who tamper with the EPA-mandated emissions equipment on their diesel-engined vehicles so they can do what's called "Rolling Coal."

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Agency Announces Automakers Are Ahead In GHG Emissions Game

For the 2013 model year (and the second year in a row), the auto industry is making cars that are 1.4 mpg cleaner than the regulations say they need to be right now.

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Senator David Vitter of Louisiana - home of Elio Motors - would create a new category for NHTSA and the EPA that would regulate three-wheeled vehicles that are neither car nor motorcycle.

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Automaker Makes Buildings More Energy-Efficient

Chevrolet is the only automaker to be awarded by EPA for emissions-reduction efforts in 2015.

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A new study finds that by tweaking the design of the window sticker, the EPA could push more buyers towards fuel efficient vehicles, like hybrids and EVs.

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Unclear Wording In SAE J-1634 Standard Doesn't Help

The EPA's test to certify the range of electric vehicles and plug-ins is a convoluted mess in many cases that often doesn't accurately evaluate driving range. Green Car Reports takes a look at the problem in a recent deep dive and finds a relatively simple solution.

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