Biggest oil companies that produce petrol in the world

Biggest oil companies that produce petrol in the world 

First       : Aramco , Country: Saudi Arabia.

Second   : Gasbrom, Country: Russia.

Third      : National Iranian Oil Company , Country:Iran.

Forth     : Pemex , Country: Mexico.

Fifth       : Exxon Mobil,  Country: United States of America .

Sixth      : BP British Petroleum, Country: United Kingdom.

Seventh  : Petrochina ,  Country: China.

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