Antiknock 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

Every line of heading 3811

• 3811 Antiknock 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.
• 3811.11 Based on lead compounds (under: Antiknock preparations).
• 3811.11.10.00 Based on tetraethyl lead or on a mixture of tetraethyl lead and tetramethyl lead (kg): General Free; Special none; Column 2 30%.
• 3811.11.50.00 Other (under: Based on lead compounds) (kg): General Free; Special none; Column 2 25%.
• 3811.19.00.00 Other (under: Antiknock preparations) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D,E, IL,JO, KR,MA,OM,P, PA,PE,S,SG); Column 2 3.7¢/kg + 60%.
• 3811.21.00.00 Containing petroleum oils or oils obtained from bituminous minerals (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL, JO,KR,MA,OM,P, PA,PE,S,SG); Column 2 60%.
• 3811.29.00.00 Other (under: Additives for lubricating oils) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL, JO,KR,MA,OM,P, PA,PE,S,SG); Column 2 25%.
• 3811.90.00.00 Other (under: Antiknock 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) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL, JO,KR,MA,OM,P, PA,PE,S,SG); Column 2 3.7¢/kg + 60%.

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.