… Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, …
Explanatory notes
… 38.11 ‑ Anti‑knock preparations, oxidation inhibitors, gum … - Additives for lubricating oils : 3811.21 - - Containing petroleum oils or oils obtained from bituminous … oils. 1.‑ Additives for crude oils . This group includes anticorrosives which are added to crude oils to protect …