(Reuters) - Japanese automakers would need to boost their fuel economy by 24.1 percent by fiscal 2020 to meet the new standards being drawn up by the government, the Nikkei business daily reported.
The tentative guidelines, which could take effect as early as next spring and measures improvement from a base year of fiscal 2009, will apply to average fuel economy for an automaker's entire vehicle lineup, the newspaper said.
For gasoline engines, the fuel economy benchmark will rise from an average of 16.3 km per liter in fiscal 2009 to 20.3 km in fiscal 2020, the Nikkei said.