No, OPEC does not control the oil market. OPEC Member Countries produce about 45 per cent of the world's crude oil and 18 per cent of its natural gas. However, OPEC's oil exports represent about 55 per cent of the crude oil traded internationally. Therefore, OPEC can have a strong influence on the oil market, especially if it decides to reduce or increase its level of production.

OPEC seeks stability in the oil market and endeavours to deliver steady supplies of oil to consumers at fair and reasonable prices. The Organization has achieved this in a number of ways: sometimes by voluntarily producing less oil, sometimes by producing more when there is a shortfall in supplies (such as during the Gulf Crisis in 1990, when several million barrels of oil per day were suddenly removed from the market).