paper deals with the influence that the agitation speed, the temperature of processing, and the cooling profile applied during crystallization of the thickening agent exert on some rheological parameters of lubricating greases. With this aim, the in situ reaction between 12-hydroxystearic acid and lithium hydroxide was conducted to form the lithium soap. After the saponification reaction was completed, the crystallization was induced by adding different batches of the lubricating oil and cooling the stirred tank. Torque was measured during the process using a control led-rotational-speed mixing rheometer from which the energy consumption during processing was evaluated. The Metzner-Otto approach was followed to estimate the viscosity of the incipient and final lubricating greases. Linear viscoelastic and viscous flow measurements were performed on the final product. From the experimental results, we conclude that an increase in the temperature applied after the saponification reaction or a decrease in the cooling rate of the freshly prepared grease generally increases the values of the rheological parameters studied. On the other hand, by increasing the rotational speed, the values of the viscoelastic functions were significantly reduced. In addition to this finding, all of these variables affect the energy consumption during the processing. Discrepancies found in the viscosity values obtained from rotational rheometry and torque measurements during the mixing flow are attributed to the fractured layer observed in the gap between the wall and the impeller.