Light crude oil, about

Light crude oil is crude oil with a low wax content. The clear cut definition of 'light' and 'heavy' crude is hard to find, simply because the classification so made is based more on practical grounds than theoretical.

Since crudes with high viscosities are more difficult to transport/pump, those with apparently lighter wax content are referred to as 'light crude' and the ones with substantially more wax are classified as 'heavy crude'.