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Understanding crude quality has never been more important, following the dramatic rise in US shale output, which has transformed the composition of the global oil market.
There are hundreds of different grades and varieties produced around the world, from medium-sour Hungo in Angola to Norway's light-sweet Ekofisk and Mexican heavy-sour Maya crude.
The Market Insight team at S&P Global Platts has created a "periodic table of oil" cataloguing 120 of the most important grades on international markets.
The interactive chart below will for the first time allow readers to find key information in one place on region of origin, price, trade volumes, sulfur content, viscosity and trade flows.