India’s state-owned Bharat Petroleum Corp. Ltd.
(BPCL) has completed conversion of the catalytic reforming unit (CRU)
at its 12 million-tonne/year Mumbai refinery into a light naphtha
isomerization unit as part of the refiner’s program to comply with the
Indian government’s nationwide mandate of producing 100% Bharat Stage 4
(BS 4, or Euro 4-equivalent) fuels, which became effective Apr. 1.

Source: News