What is sweet crude oil?

If the percentage of sulphur is less than 0.5% in petroleum, then it is called sweet crude oil. It came to be called 'sweet' because the low level of sulphur gives the oil a mildly sweet taste and pleasant smell. It also contains a small amount of hydrogen sulphide and carbon dioxide.

Sweet Crude Oil, Sulphur, Sweet Taste, Pleasant Smell, Hydrogen Sulphide, Carbon Dioxide