Abstract: Liquid specific heat capacity of the derived of the motor lubricant oils it is of great practical importance in the branch of the petrochemical engineering, because it is associated with the refinery operations of petroleum and other correlated processes. This study aims to characterize thermal degradation process of motor mineral, synthetic and semi-synthetic lubricant oils, in relation to its liquid specific heat capacities. The analyzed lubricating oils present an increase in your heat transfer capacity in function of the increase of the temperature.