Global car firm Ford is being urged to cure its addiction to oil.
Flagging up the findings of the US Environmental Protection Agency's fuel economy report for 2006, the Jumpstart Ford Campaign said Ford cars and trucks had a poor fuel economy of just 19.7 miles per gallon (mpg), on average.
The vehicles included the Aston Martin, Jaguar, Land Rover, Mazda and Volvo brands.
The JFC urged Ford to "rapidly" phase out production of "gas-guzzling" cars, replacing them with alternatives such as hybrids.
The JFC, a coalition comprised of the Rainforest Action Network, Global Exchange and the Ruckus Society, said they were not fooled by more false promises from Ford.
Jennifer Krill, Rainforest Action Network's zero emissions campaign director, said the "downward spiral" of oil addiction was "devastating" the firm's economic future.
"Mr Ford is on our airwaves right now fooling America by telling us that he is committed to breaking our dependence on oil while he breaks his promise to build more hybrids and his company produces one of the most oil-addicted fleets in America," she said.
Ford came second to DaimlerChrysler as the worst offender in the 2006 EPA figures.
The JFC said Ford was "stubbornly" producing cars that endangered health, national security and the environment.
Ford yesterday announced it would spend £1 billion over the next six years on research and development projects in the UK, to improve the fuel efficiency of its vehicles.