Final answer:
The other type of chemical-plant-manufactured synthetic molecules used in another industrial synthetic gear oil option is Polycyclic Aromatic Hydrocarbons (PAHs). PAHs are a group of hydrocarbons that consist of fused benzene rings, which are rings that share a common side. They are typically produced by fractional distillation and additional chemical manipulation of naturally sourced chemicals, crude oil, or coal tar.
Step-by-step explanation:
The other type of chemical-plant-manufactured synthetic molecules used in another industrial synthetic gear oil option is Polycyclic Aromatic Hydrocarbons (PAHs). PAHs are a group of hydrocarbons that consist of fused benzene rings, which are rings that share a common side. They are typically produced by fractional distillation and additional chemical manipulation of naturally sourced chemicals, crude oil, or coal tar. PAHs are commonly used in industrial synthetic gear oils due to their stability and lubricating properties.