Section 06 Products of the chemical or allied 38 Miscellaneous chemical products 38 11 Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including gasoline) or for other liquids used for the same purposes as mineral oils Commodity Code Description 38 11 11 - - Based on lead compounds 38 11 19 - - Other 38 11 21 - - Containing petroleum oils or oils obtained from bituminous minerals 38 11 29 - - Other 38 11 90 - Other