fuel efficiency

Legal battle looms as White House works up plan to revoke California's right to regulate auto emissions

Governor Jerry Brown warns unless action is taken to drive development of EVs in the US Chinese dominance will pose a "major threat" to the country's auto industry

Lightfoot will install its in-car coaching device into 200 vans and 20 cars that make up Hughes' delivery fleet

Japanese carmaker says from 2019 it will sell cars fitted with engines that largely eliminate need for spark plugs, improving fuel consumption by 30 per cent

Century-old rotating columns fixed to ship's deck interact with wind to provide forward thrust and could make 10 per cent fuel saving