As an expert in the field of energy resources, I can provide an in-depth analysis of the quality of oil from various countries around the world. The quality of oil is determined by several factors, including its viscosity, sulfur content, density, and the presence of other impurities. It is important to note that the "best" oil is a subjective term and can vary depending on the intended use of the oil.

Saudi Arabia is often recognized for having some of the highest quality oil due to its low sulfur content and high API gravity, which makes it less dense and easier to refine into gasoline and other products. Saudi Arabia has almost one-fifth of the world's proven oil reserves and ranks as the largest producer and exporter of oil in the world.

Canada is another country with significant oil reserves, particularly in the form of oil sands, which are a mixture of crude bitumen, sand, clay, and water. The oil extracted from Canadian oil sands is considered to be of lower quality compared to conventional crude oil due to its higher viscosity and the more complex refining process required.

Iran and Iraq also have substantial oil reserves. Iran's oil is known for its high sulfur content, which can make it more challenging to refine but is still in high demand due to its abundant reserves. Iraq's oil, on the other hand, is considered to be of high quality, with a low sulfur content and high API gravity.

Kuwait has oil reserves that are similar to those of Saudi Arabia in terms of quality, being light and low in sulfur. This makes Kuwaiti oil highly desirable for refining into various petroleum products.

The United Arab Emirates (UAE) also boasts a significant amount of high-quality oil reserves. The UAE's oil is known for its low sulfur content and high API gravity, similar to that of Saudi Arabia.

Russia is another major player in the oil industry, with vast reserves that include a variety of oil qualities. Russian oil can range from light sweet crude to heavier, more viscous grades that require more extensive refining.

Libya and Nigeria also have notable oil reserves. Libyan oil is generally of good quality, with a low sulfur content and high API gravity. Nigerian oil, while abundant, is often heavier and has a higher sulfur content, which can affect its refining and marketability.

In conclusion, the "best" oil is not solely determined by the country of origin but by the specific properties of the oil and its suitability for various applications. Countries like Saudi Arabia, Kuwait, and the UAE are often recognized for their high-quality, low-sulfur oil, which is easier to refine and thus highly valued in the global market. However, other countries with different oil qualities also play a crucial role in meeting the diverse needs of the global oil industry.

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Saudi Arabia has almost one-fifth of the world's proven oil reserves and ranks as the largest producer and exporter of oil in the world.CANADA. Proven oil reserves: 173.105. ... IRAN. Proven oil reserves: 154.58. ... IRAQ. Proven oil reserves: 141.35. ... KUWAIT. Proven oil reserves: 104. ... UNITED ARAB EMIRATES. ... RUSSIA. ... LIBYA. ... NIGERIA.read more >>