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On Wednesday, Transportation Secretary Ray LaHood unveiled a new window sticker that would be required for all 2013 model-year vehicles on dealer lots. The sticker revises the current version, which provides only basic information regarding the average fuel consumption of a vehicle.

In a first for the Environmental Protection Agency, the 2013 sticker includes a gallons-per-mile metric, whereby the estimated fuel consumption per 100 miles of combined city and highway driving is provided. Individual city, highway and combined m.p.g. metrics are retained on the sticker.

In another first, the E.P.A. designed unique stickers to suit different powertrains. The label for a purely electric vehicle, for example, will reflect the estimated range of the E.V. and the estimated average yearly cost of charging it, as well as a numerical miles-per-gallon equivalent, expressed as MPGe.

The purely electric Tesla Roadster, not surprisingly, claims the gaudiest sticker among passenger vehicles, reflecting a 245-mile range and a fuel economy and greenhouse rating of 10 out of a possible 10. That said, the stickers do not take into account the so-called well-to-wheel efficiency of the vehicles, which consider the greenhouse emissions of power sources.

Some environmental advocates had hoped the E.P.A. would select another sticker proposal, which would have assigned a letter grade to a car based on its fuel economy and total emissions relative to the entire fleet of new cars. That proposal was opposed by many within the auto industry, including the National Automotive Dealers Association, as being ambiguous.

On Jalopnik, Justin Hyde reposted a photo from Twitter, in which Mr. LaHood is said to have arrived at the Transportation Department on Wednesday in a Chevrolet Suburban, which is rated at 15 m.p.g. in city driving. President Obama announced on Tuesday that federal employees were expected to use “midsize or smaller sedans” for most transportation needs.

To view examples of the new stickers, visit the E.P.A. Web site.