India will soon be switching to the world`s cleanest petrol and diesel from April 1 as it leapfrogs straight to Euro-VI emission compliant fuels from Euro-IV grades which are used now. This feat has been achieved in just three years and none of the large economies around the globe have been able to achieve it. India will join the select league of nations using petrol and diesel containing just 10 parts per million of sulphur as it looks to cut vehicular emissions that are said to be one of the reasons for the choking pollution in major cities. Almost all refineries had begun producing ultra-low sulphur BS-VI fuel which is equivalent to Euro-VI grade petrol and diesel, by the end of 2019 and oil companies have now undertaken the tedious task of replacing every drop of fuel in the country with the new one. They are on track for supplying BS-VI fuel from April 1. Almost all refineries have begun supplying BS-VI fuel and the same has reached storage depots across India. BS-VI has a sulphur content of just 10 ppm and emission standards are as good as CNG. The new fuel will result in a reduction in NOx in BS-VI compliant vehicles by 25 percent in petrol cars and by 70 percent in diesel cars.