… oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared …
Explanatory notes
… oxidation inhibitors, gum inhibitors, viscosity improvers, anti‑corrosive preparations and other prepared … oils. This group includes : (a) Viscosity improvers , based on polymers such as polymethacrylates, … those used for gasoline (petrol). (c) Cetane number improvers for gas oil, for example those based on alkyl …