Also known as: high sulfur

In refining, a crude oil grade is called sour if it has a high sulfur content. As opposed to a sweet crude, which is one with a very low sulfur content.

Typically, a sour crude would be one with anything over 1% sulfur content, by weight.

McKinsey uses cookies to improve site functionality, provide you with a better browsing experience, and to enable our partners to advertise to you. Detailed information on the use of cookies on this Site, and how you can decline them, is provided in our cookie policy. By using this Site or clicking on "OK", you consent to the use of cookies.