Warm mix asphalt (WMA) is becoming more popular in the industry. The prospect of lower energy use, lower emissions, and a more usable product appeals to a sector under environmental pressure. WMA is a generic term for a number of technologies that allow the manufacturing of hot-mix asphalt (HMA) pavement material to be mixed and compacted at lower temperatures. WMA is blended and compacted at temperatures 20 to 50 degrees Celsius lower than traditional HMA. This paper presents a laboratory investigation of WMA mixes produced by an additive Sasobit ®. The study also evaluates the effect of addition of Sasobit ® on the rheology of viscosity graded asphalt VG 30. Two different percentages of Sasobit ® were tested with VG 30. Results of binder rheology are presented in this paper. Laboratory study was conducted to investigate the properties of the asphalt mixes affected during development of the mix at lower temperatures. Warm mixes can be successfully created at lower temperatures than HMA mixes, according to the results of the evaluation. From the study of three HMA plants energy savings are found in case of WMA mixes with Sasobit ®. Details about the energy consumed during various processes which occur during production are accounted in the study. It is concluded from the present study that use of Sasobit ® lowers production temperatures by 40 °C, which lead to a savings of about 25% in terms of fuel. © 2023