Gear oil is composed of polyisobutylene, mineral-based base oils, and additives, and can be used for industrial gear lubrication. The dataset includes primary raw materials, auxiliary materials, energy inputs, and atmospheric emissions from the production process; however, infrastructure such as production equipment and facility construction is not included within the system boundaries of the dataset. The life cycle inventory is compiled from data sourced from multiple references. The manufacturing process of gear oil involves procedures such as oil formulation, continuous blending, refining, additive incorporation, filtration, and filling.