The zinc oxide nano-particles have been used in this research. In this work, zinc oxide nanoparticles have been added to light and heavy crude oil. In this research, thermoelectric and physical properties of light and heavy crude petroleum have been measured, experimentally. In addition, dimensionless groups in hydrodynamics and heat transfer calculations are presented. This research illustrates that heat capacity of light and heavy crude petroleum varies from 4256 J/kg•˚C to 4457 J/kg•˚C and 4476 J/kg•˚C to 5002 J/kg•˚C, respectively. Moreover, heat capacity of light and heavy nano-crude petroleum is changing from about 4285 J/kg•˚C to 4496 J/kg•˚C and 4494 J/kg•˚C to 5021 J/kg•˚C, respectively.