Abbreviations for various types of synthetic oils

Synthetic oils are oils that are synthesized artificially, unlike oils such as animal and vegetable oils and petroleum, which are formed by nature. Synthetic oil is an umbrella term that includes different types of synthetic oils that are commonly available:
　　PAO: polyalphaolefins (polyalphaolefins)
　　PIB: Polyisobutene (Polyisobutenes)
　　PAG: Polyethylene glycol (Polyalkylene)
　　Glycol or Polyglycols)
　　OSP: Oil Soluble PAG (Oil Soluble Polyalkylene Glycols)
　　Diester:Diester oil
　　POE: Polyester Oil (Polyolesters)
　　PE:Phosphate Esters
　　GTL: Gas-to-Fluids
　　Silicones: Silicone oils
　　PFPE: Perfluorinated polyether
　　SHC: Synthetic Hydrocarbons (Synthetic Hydrocarbons) PAO is a typical representative of SHC.
　　AB: Alkyl benzene (Alkyl Benzenes)