Tags: cars | fuel | gas mileage | rules | epa

EPA Tightens Rules for Measuring Fuel Economy in Cars

Image: EPA Tightens Rules for Measuring Fuel Economy in Cars
(Monika Wisniewska/Dreamstime)

By    |   Tuesday, 24 Feb 2015 07:47 AM

The Environmental Protection Agency is taking steps to bring the actual gas mileage motorists experience more in line with what car manufacturers promise in their advertising, The New York Times reported.

The agency issued a new, and technically voluntary, standard for how the tests need to be carried out — starting in model-year 2017 — in a 10-page document sent to manufacturers on Monday. It chose a voluntary route because of the long delays involved in the federal rule-making process, the Times said.

Car companies conduct their own mileage testing subject to audits by the EPA. Most provide accurate data, the newspaper reported.

Automakers that exaggerate their fuel economy ratings face penalties. The EPA recently fined Hyundai and its sister company, Kia, under the Clean Air Act some $300 million for overstating its mileage results.

Manufacturers appear to welcome the new guidelines. Some argued that the existing rules were not specific enough. The updated procedures could help assure that competitors all play by the same rules, the Times reported.

"We think this guidance will result in more accurate fuel economy numbers that consumers can trust," said the EPA's air quality compliance director, Byron Bunker, the Times reported.

The federal government has instructed automakers to improve their average corporate fuel economy to 54.5 miles per gallon by 2025 compared to today's 25 mpg average.

The EPA is soon expected to address how manufacturers may average mileage ratings from hybrid and electric cars into a car's overall performance, which includes gasoline versions of the same model, according to the Times.

To determine fuel economy, cars are measured as they coast down from 70 mph to a stop on a straight, flat road. The data is used to program dynamometers that car manufacturers employ to determine fuel economy ratings, Automotive News reported.

Actual fuel economy varies for an array of reasons, including whether tires are properly inflated, according to the Energy Department.

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The Environmental Protection Agency is taking steps to bring the actual gas mileage motorists experience more in line with what car manufacturers promise in their advertising, The New York Times reported.
cars, fuel, gas mileage, rules, epa
317
2015-47-24
Tuesday, 24 Feb 2015 07:47 AM
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