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NHTSA's Corporate Average Fuel Economy (CAFE) standards regulate how far our vehicles must travel on a gallon of fuel. NHTSA sets CAFE standards for passenger cars and for light trucks (collectively, light-duty vehicles), and separately sets fuel consumption standards for medium- and heavy-duty trucks and engines. NHTSA also regulates the fuel-economy window stickers on new vehicles. This site contains information about many aspects of these programs, and we encourage you to check back as new information is posted.


In accordance with the National Environmental Policy Act, NHTSA intends to prepare an environmental impact statement (EIS) to analyze the potential environmental impacts of new fuel efficiency standards for model years 2030 and beyond medium- and heavy-duty on-highway vehicles and some work trucks that NHTSA will be proposing pursuant to the Energy Independence and Security Act of 2007. This notice initiates the process for determining the scope of considerations to be addressed in the EIS and for identifying any significant environmental issues related to the proposed action. NHTSA invites comments from Federal, State, and local agencies, Indian tribes, stakeholders, and the public in this scoping process to help identify and focus any matters of environmental significance and reasonable alternatives to be examined in the EIS.

In accordance with the National Environmental Policy Act, NHTSA intends to prepare an environmental impact statement to analyze the potential environmental impacts of new Corporate Average Fuel Economy standards for model years 2027 and beyond passenger cars and light trucks, and new fuel efficiency standards for model years 2029 and beyond heavy-duty pickup trucks and vans. NHTSA is seeking comment on the scope of considerations to be addressed in the EIS, and for identifying significant environmental effects related to the proposed action. NHTSA invites comments from Federal, State, and local agencies, Indian tribes, stakeholders, and the public in this scoping process to help identify and focus any matters of environmental significance and reasonable alternatives to be examined in the EIS.

NHTSA and the Environmental Protection Agency (EPA) issued a joint final rule establishing new requirements for a fuel economy and environment label that will be posted on the window sticker of all new automobiles sold in the U.S.

President Obama directed NHTSA and EPA to develop and issue the next phase ("Phase 2") of medium- and heavy-duty vehicle fuel efficiency standards and greenhouse gas (GHG) standards by March 2016. Under this timeline, the agencies currently expect to issue a Notice of Proposed Rulemaking (NPRM) by March 2015. This second round of fuel efficiency standards will build on the first-ever standards for medium- and heavy-duty vehicles (model years 2014 through 2018).

The new Corporate Average Fuel Economy standards require an industry-wide fleet average of approximately 49 mpg for passenger cars and light trucks in model year 2026, the strongest cost savings and fuel efficiency standards to date. The new standards will increase fuel efficiency 8% annually for model years 2024-2025 and 10% annually for model year 2026. They will also increase the estimated fleetwide average by nearly 10 miles per gallon for model year 2026, relative to model year 2021.

Strong fuel economy standards strengthen U.S. energy independence and help reduce reliance on fossil fuels. Since CAFE was signed into law in 1975, the standards have reduced American oil consumption by 25%, or approximately 5 million barrels a day since then. The new CAFE standards for model year 2024-26 will reduce fuel use by more than 200 billion gallons through 2050, as compared to continuing under the old standards.

Increasing vehicle efficiency and reducing fuel use will save American families and consumers money at the pump. Americans purchasing new vehicles in 2026 will get 33% more miles per gallon as compared to 2021 vehicles. This means new car drivers in 2026 will only have to fill up their tanks three times as compared to every four times that new car drivers today do for the same trips.

This announcement of new standards comes as the automobile industry is retooling production for future models in response to rapidly growing market demand for cleaner, more fuel-efficient vehicles. Nearly all auto manufacturers have announced new electric vehicle models. More robust fuel economy standards will encourage the industry to continue improving the fuel economy of cars powered by internal combustion engines as the transportation sector transitions to electrification.

Congress first established Corporate Average Fuel Economy (CAFE) standards in 1975, largely in response to the 1973 oil embargo. CAFE standards set the average new vehicle fuel economy, as weighted by sales, that a manufacturer's fleet must achieve.

Through the Energy Policy and Conservation Act of 1975, Congress established fuel economy standards for new passenger cars starting with model year (MY) 1978. These standards were intended to roughly double the average fuel economy of the new car fleet to 27.5 mpg by model year (MY) 1985.

Federal law directing increases in fuel economy became necessary because oil consumption had been steadily escalating, in large part due to the relative stagnation in CAFE standards, the doubling of annual vehicle miles traveled in the previous 25 years, and a sizable increase in the market share of less efficient SUVs and light trucks.

In 2009, a historic agreement between the Federal Government, state regulators, and the auto industry established a national program to implement these first meaningful fuel efficiency improvements in over 30 years and the first-ever global warming pollution standards for light-duty vehicles.

The EPA established global warming pollution standards of 250 grams per mile, on average, for model year (MY) 2016 vehicles. NHTSA set fuel efficiency standards which target a new vehicle average of 34.1 miles per gallon in MY2016. These two standards reflect a harmonized level of stringency. CARB agreed to accept compliance with the National Program as compliance with its standards even though the federal standards are weaker until 2016.

These new standards will reduce average global warming emissions of new passenger cars and light trucks to 163 grams per mile (g/mi) in model year 2025. This is equivalent to 54.5 miles per gallon (mpg), if the standards were met exclusively with fuel efficiency improvements 1.

Car buyers now have more information than ever before-- including fuel economy, fuel costs, and environmental impacts such as smog and greenhouse gas ratings-- for all new vehicles, including advanced technologies such as electric cars and plug-in hybrids (PHEVs).

The benefits of a vehicle fuel economy and environment label now extend to the used car market, too. If you are selling a car or truck, you can print or download a used vehicle label on, making it easy for you to provide fuel economy and CO2 information for your vehicle. The web-tool allows you to easily search by model year, make, model, engine, and transmission options to find the appropriate vehicle.

There are a lot of things that can affect the gas mileage of your car. At first glance, the wheels and tires of your vehicle may not seem like they would have an impact at all on your fuel economy. However, they directly impact the overall performance and life of the automobile and how efficiently the car performs, depending on how well they are maintained and the size of the wheels.

Tire treads can impact your fuel economy because 35-50 percent of the rolling resistance of a tire comes from the tire tread. Some tread compounds can reduce rolling resistance a great deal. In addition, the shallower the tread, the more fuel efficient the tire will be. So if you can achieve traction, the more fuel-efficient tires might be shallow-tread rib designs. Unlike race car drivers, who use tires with no tread because they provide less resistance and allow their vehicles to more easily achieve higher speeds, the average driver needs tread to help the vehicle easily brake when the weather is bad. Use the proper type of tire for the type of driving. For instance, using chunky tires suited for off-roading for urban driving will significantly decreasing fuel efficiency.

Cold weather and winter driving conditions can significantly reduce fuel economy. Fuel economy tests show that, in city driving, a conventional gasoline car's gas mileage is roughly 15% lower at 20F than it would be at 77F. It can drop as much as 24% for short (3- to 4-mile) trips.

The effect on hybrids is typically greater - with fuel economy dropping about 30% to 34% under these conditions. For hybrids, fuel economy typically decreases by 20% to 40% in city driving and 25% to 45% on short trips.

For electric vehicles (EVs), fuel economy can drop roughly 39% in mixed city and highway driving, and range can drop by 41%. About two-thirds of the extra energy consumed is used to heat the cabin. When the cabin heater is not used, EV fuel economy is 8% lower at 20F than at 75F. Driving range is about 12% lower.

The light-duty vehicle fleet is expected to undergo substantial technological changes over the next several decades. New powertrain designs, alternative fuels, advanced materials and significant changes to the vehicle body are being driven by increasingly stringent fuel economy and greenhouse gas emission standards. By the end of the next decade, cars and light-duty trucks will be more fuel efficient, weigh less, emit less air pollutants, have more safety features, and will be more expensive to purchase relative to current vehicles. Though the gasoline-powered spark ignition engine will continue to be the dominant powertrain configuration even through 2030, such vehicles will be equipped with advanced technologies, materials, electronics and controls, and aerodynamics. And by 2030, the deployment of alternative methods to propel and fuel vehicles and alternative modes of transportation, including autonomous vehicles, will be well underway. What are these new technologies - how will they work, and will some technologies be more effective than others? 041b061a72


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