The Types segment classifies PAO based on molecular architecture and viscosity grade, providing a secondary layer of the market taxonomy. Low‑viscosity PAO (e.g., PAO‑2 to PAO‑4) is engineered for high‑speed gear and turbine oils, contributing approximately 35 % of production due to its prevalence in automotive and aerospace sectors. High‑viscosity PAO (PAO‑6 to PAO‑12) supplies the bulk of industrial gear and hydraulic fluids, representing about 45 % of output because of its load‑bearing capacity. Synthetic blends, which combine PAO with ester or mineral bases, occupy roughly 15 % of the market, offering cost‑effective performance for mid‑tier applications. Finally, Specialty grades—including ultra‑low‑temperature and fire‑resistant formulations—make up the remaining 5 %, serving niche markets such as extreme‑climate equipment and safety‑critical systems. This typology clarifies how each PAO grade aligns with specific performance demands, thereby influencing the aggregate market size.