As defined by the U.S. Geological Survey (USGS), heavy oil is a type of crude oil characterized by an asphaltic, dense, viscous nature (similar to molasses), and its asphaltene (very large molecules ...

Petrol is known to be one of the most widely used fuels in the modern world. This non-renewable resource powers millions of cars, motorcycles, and machinery every day. However, one of the major ...