PSUs like HPCL, IOC, BPCL will now need to introduce Ultra Low Sulphur Diesel (ULSD) or S50 which is cleaner diesel fuel that has a maximum sulphur content of 50 parts per million (ppm). The new diesel will be still far below the international standards of 15ppm that has been used since 2006.
Euro IV vehicles will also be mandatory in the city from April 2010. These laws will come into force initially in 11 cities in India and later on adopted by tier II and tier III cities of the country. "
Source: cartradeindia.com





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