− | Other parameters included in this category are [[API gravity]] (or density), color, wax content, pour point, and viscosity. Most of these parameters are of little value, however, because they are highly susceptible to transformation processes. | + | Other parameters included in this category are [[API gravity]] (or density), color, wax content, pour point, and [[viscosity]]. Most of these parameters are of little value, however, because they are highly susceptible to transformation processes. |