A generalized kinematic viscosity-temperature correlation for undefined petroleum fractions of all boiling ranges including 455+degrees-C fractions have been developed to represent the data for a wide range of temperature from 30 to 200-degrees-C. The correlation is based on experimental kinematic viscosity data for twenty TBP fractions of Arab heavy, Arab medium, Arab light and Arab extra-light crude oils. The proposed correlation has been found to fit all the eperimental data consisting of 248 measurements of the kinematic viscosity with an overall average absolute deviation of 9.07% compared to 15.47% given by ASTM method.