The government has advanced the date for country-wide implementation of Euro VI compliant fuels by four years to April 1, 2020, in an effort to curb pollution.
Pollution levels in Indian cities have often been compared to China's Beijing.
A WHO study in 2014 said India's capital city New Delhi had the worst air quality out of the 1,600 cities surveyed worldwide.
($1 = 66.7800 Indian rupees)
© Thomson Reuters 2016