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The regulator says the technology is there and costs are falling.

Despite protests from some automakers, the US Environmental Protection Agency maintains its target for reduced greenhouse-gas emissions for 2025.

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Auto market shows no progress towards CAFE goal.

Fuel-efficiency average doesn't budge from 2015 or 2104 level, as more trucks sales offset higher plug-in vehicle demand.

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The reasons why are fascinating.

Advanced engine tech and lighter pickups help mitigate the impact of putting more trucks and SUVs on the road.

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Four years later, the Hyundai fuel economy fiasco is pretty much over.

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18 city, 27 highway, 21 combined mpg.

Fuel economy figures for the Challenger GT are out.

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Four engine choices will power up the new SUV.

Toyota says it expect 85 percent of all new Highlander buyers will get the fuel-saving tech.

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Higher SUV sales from lower fuel prices will eventually hinder industry.

Industry is investing $200 billion to boost fleetwide fuel efficiency, and will cut jobs if that investment isn't returned.

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'Give us your docs.'

Will the Japanese Transport Ministry come to the same conclusions as Mitsubishi's internal investigation?

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Japan's Transport Ministry claims automaker overstated fuel economy for eight models.

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But the company's leadership denies any knowledge of the comments.

A new hire warned 20 company execs, including senior officials from the company's performance testing department, about the mileage issue in 2005.

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Chairman fears strict fuel economy requirements will drive up car prices.

The debate over 2025 Corporate Average Fuel Economy requirements continues.

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Turns out, the 2025 CAFE standard wasn't a mandate, but an estimate.

The EPA and the auto industry have agreed that the 54.5 mpg target was simply too high. So, they moved the goalposts.

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PSA loaded its cars with luggage, ran the A/C during tests.

PSA Peugeot Citroen's testing produces fuel economy figures that are about 40 percent below published levels.

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Lagging sales of hybrids and diesels don't help either.

Higher sales of SUVs and pickup trucks help bring fleetwide new-vehicle fuel economy down a bit in June.

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As many as 135,000 GM SUV owners may be reimbursed.

GM will pay back some SUV owners for mistakes in MPG window stickers. The affected models include the Chevy Traverse, GMC Acadia, and Buick Enclave.

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About 170,000 GM customers may be reimbursed.

General Motors is working on a plan to pay crossover SUV owners for fuel-economy overstatement.

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A new House bill proposes decreasing the ethanol fuel-blend mandate.

The minimum requirements for ethanol levels in the US are getting more difficult to reach because cars today getting better fuel economy.

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Following the Mitsubishi scandal that prompted a merger with Nissan, Suzuki admits to using improper tests for fuel consumption.

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The widening scandal could lead to Nissan gaining control.

Mitsubishi says its shady fuel-economy test practices may have been used on all vehicles it sells and has sold in Japan.

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