India in 2015 decided to leapfrog straight to Euro-VI emission norm complaint petrol and diesel from April 2020 from current Euro-IV grade.
While the deadline for the rest of the country stands, for national capital, which is among the most polluted cities in the world, the deadline for introduction of BS-VI - equivalent to Euro-VI grade, has been preponed to April 2018, the Petroleum Ministry said in a statement.
Delhi consumed 906,000 tons of petrol and 1.26 million tonnes of diesel in 2016-17 and meeting that requirement from April next year would not be a problem.
"Taking into account the serious pollution levels in Delhi and adjoining areas, Petroleum Ministry in consultation with public sector oil marketing companies has decided for preponement of BS-VI grade auto fuels in national capital territory of Delhi with effect from April 1, 2018 instead of April 1, 2020," it said.
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The introduction of Euro-VI grade fuel is expected to help mitigate the problem of air pollution in NCT of Delhi and surrounding areas, the statement said.
"Migration to BS-IV grade fuels shows Indias resolve to cut down emissions," the statement said. "As a next step in this direction, Government in consultation with stakeholders has decided to meet international best practices by leapfrogging directly from BS-IV to BS-VI grade by April 1, 2020, skipping BS-V altogether."
Oil refineries will need to invest Rs 80,000 crore in upgrading petrol and diesel quality to meet cleaner fuel specifications by 2020.
According to Indian Oil Corp (IOC), for petrol engines, one of the most critical specification is Research Octane No. (RON), which has improved from 88 in BS-II to 91, which is at par with regular 91 octane gasoline (petrol) required for Euro VI emission norms.
Previously, the fuels meeting EuroIV or Bharat Stage (BS)IV specifications were to be supplied throughout the country by April 2017 and BSV or EuroV grade fuel by April 1, 2020.
But now instead of stepwise upgradation from BSIV to BSV and then from BSV to BSVI, the government plans to switch over directly from BSIV to BSVI auto fuels by April 1, 2020.
Oil refineries had previously upgraded technology and invested over Rs 55,000 crore for production and supply of BS III/IV fuels.
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