The metropolis requires more than 8 crore (80 million) litres of fuel every month and three oil companies will supply both petrol and diesel through their existing 243 outlets.
The three companies -- Bharat Petroleum, Hindustan Petroleum and Indian Oil Corporation -- have 97, 97 and 49 outlets, respectively, in the city.
"Mumbai requires at least 8 crore litres per months and the three companies will supply the BS IV fuel through their 243 outlets," BPCL's general manager (retail), west region, P C Srivastava, said.
The city requires 4 crore (40 million) litres of petrol and 3.8 crore litres (38 million) of diesel per month. BPCL has already started supplying 1.50 crore (15 million) litres of BS IV fuel through its 97 outlets from April 1, Srivastava said.
"The petroleum sector has constantly endeavoured to provide clean and green fuels to Mumbaikars," he said.
India adopted stricter emission norms under which 13 major cities have been upgraded to BS IV from BS III as per the recommendations of the Mashelkar Committee to control pollution from April 1.