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Official

Scientists say vehicles would lose 3 miles per gallon by 2021 under the bill.

Scientists say vehicles would lose 3 miles per gallon by 2021 under the bill.

Official

Mileage numbers go down for that configuration.

Mileage numbers go down for that configuration.

Official

Yikes. The EPA has finally released its official fuel economy rating for the Fisker Karma, and it's not high: just 52 MPGe, an all-electric range of 32 miles and 20 miles per gallon on gasoline when the battery runs dry. This is well below the numbers that Fisker reps were bandying about in past years: 67.2 mpge and an all-electric range of 50 miles.

Official

Yikes. The EPA has finally released its official fuel economy rating for the Fisker Karma, and it's not high: just 52 MPGe, an all-electric range of 32 miles and 20 miles per gallon on gasoline when the battery runs dry. This is well below the numbers that Fisker reps were bandying about in past years: 67.2 mpge and an all-electric range of 50 miles.

As far as we know, the first production Chevrolet Volt models are still awaiting their official EPA stickers. Nissan, though, has received the details on what the government agency has rated its all-electric Leaf at, and it looks good: a combined rating of 99 miles per gallon (equivalent) which breaks down into 106 city/92 highway. The official EPA range for the car is 73 miles, which Nissan admits is a variable (we know it can be beaten), and the annual electric cost is estimated at $561. The L

As far as we know, the first production Chevrolet Volt models are still awaiting their official EPA stickers. Nissan, though, has received the details on what the government agency has rated its all-electric Leaf at, and it looks good: a combined rating of 99 miles per gallon (equivalent) which breaks down into 106 city/92 highway. The official EPA range for the car is 73 miles, which Nissan admits is a variable (we know it can be beaten), and the annual electric cost is estimated at $561. The L

According to the Environmental Protection Agency, which first started keeping track of such things way back in 1975 around the time of the first fuel crisis in America, the average fuel economy of all vehicles sold in the U.S. hit a record high in 2009. For those favoring hard data, that equals 22.4 miles per gallon. Not surprisingly, average fuel economy has been on an upward path over the last several years (excluding a small dip in 2008).

As expected, the EPA has released its first-ever proposal for greenhouse gas and fuel efficiency standards for heavy-duty vehicles. The proposal, and that's all it is at this point, would create three new categories for heavy trucks: combination tractors, heavy-duty pickups and vans, and vocational vehicles. The rules will cover on-road vehicles with a gross vehicle weight at or above 8,500 pounds, unless these vehicles are already covered under CAFE. All of these proposals would start with the

As expected, the EPA has released its first-ever proposal greenhouse gas and fuel efficiency standards for heavy-duty vehicles. The proposal, and that's all it is at this point, would create three new categories for heavy trucks: combination tractors, heavy-duty pickups and vans, and vocational vehicles. The rules will cover on-road vehicles with a gross vehicle weight at or above 8,500 pounds, unless these vehicles are already covered under CAFE. All of these proposals would start with the 2014

Proposed window stickers for plug-in hybrid vehicles – click above for high-res image gallery

It's not all that often that you hear automakers cry out for stronger regulations and stricter guidelines. In fact, the cries typically go the other way, begging for less oversight and looser laws. So, when automakers band together suggesting changes to CAFE guidelines beyond 2016 that would take fuel economy figures to new heights, we should probably listen, right?

2010 Audi S4 – Click above for high-res image gallery

The EPA is aware that range-extended electric vehicles can game the current fuel economy test to deliver mileage estimates way up in the stratosphere. It makes for impressive advertising, like General Motors' touting of the Chevrolet Volt's estimated 230 mpg, but the EPA wants to give a more realistic reflection of the fuel efficiency of these types of cars, and it's not alone.