Knowing the essential blending techniques covered by the insulating oil blending studies is crucial, as evidenced by the findings presented in them. Mapping the pertinent parameters to the corresponding technique is an important step in blending investigation. This thorough but perceptive evaluation relates the results of problems with the mixing procedure on different insulating fluids. The techniques employed in this context offer not only a preview but also specifics on the chosen blending process, important characteristics, intended usage, standards, unique testing, and software. In general, these data are used as a bundle to create new ideas for combining insulating fluid investigations. Future study will focus on using cutting-edge techniques to increase analysis speed through the use of comprehensive tools. This is relevant to the insulating oils that are used in the Distribution Transformer (DT) and the Power Transformer (PT).