www.opec.org] How much oil do the top oil producers produce a day? Amount of oil produced per day: ◦Saudi Arabia* - 8.1 million barrels per day; *Including share of production from the Neutral Zone ◦Former Soviet Union - 6.9 million barrels per day; ◦United States - 6.5 million barrels per day; ◦I.R. Iran - 3.6 million barrels per day; ◦China - 3.2 million barrels per day.