As a domain expert in the field of energy and economics, I have a deep understanding of the global oil market and its dynamics. When discussing the country that makes most of its money from oil, it is essential to consider not only the production volume but also the export revenue, as these factors significantly influence a country's economic reliance on oil.

In the past, the oil industry has been dominated by countries with vast reserves and high production rates. However, the landscape has changed over the years due to technological advancements, geopolitical shifts, and market fluctuations. According to historical data, Russia has been a leading oil producer, with a significant output that contributes substantially to its economy. However, the revenue from oil exports is not solely determined by production volume but also by the price of oil and the quantity exported.

The United States, despite being a large consumer of oil, has also become a significant producer, particularly with the advent of shale oil extraction technologies. The U.S. has seen a surge in production, which has had a profound impact on its energy independence and global oil market dynamics.

Saudi Arabia, as part of OPEC, has always played a crucial role in the oil market. With vast reserves and a strategic position in the Middle East, Saudi Arabia's oil revenue is a cornerstone of its economy. The country's ability to adjust production levels to stabilize oil prices further underscores its influence.

China and Iran also feature among the top oil producers, but their economic reliance on oil is not as pronounced as some other countries due to the diversity of their economies and geopolitical considerations.

It is important to note that the revenue from oil is not the sole indicator of a country's wealth derived from this commodity. Factors such as the cost of production, refining capabilities, and domestic consumption also play a vital role. Additionally, the global oil market is influenced by a myriad of factors including supply and demand, geopolitical tensions, and economic policies of oil-producing nations.

In conclusion, while Russia, Saudi Arabia, the United States, China, and Iran are significant players in the oil industry, the country that makes the most money from oil is likely to be one that has a high export-to-production ratio, benefits from favorable oil prices, and has minimal production costs. The dynamics of the oil market are complex and subject to change, making it challenging to pinpoint a single country as the top revenue generator without considering the specific time frame and market conditions.

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Top 5 Oil-Producing Countries In 2011Russia. Russia is the single largest oil producing country in the world, with a production of about 10,124,000 barrels per day, according to statistics compiled by the U.S. Energy Information Administration. ... Saudi Arabia. ... The United States. ... China. ... Iran.read more >>