HTS 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

As of Revision 22 (2026), effective Oct 30, 2026Source: USITC HTS ↗

Chapter 99 measures listing products under 3811

9903.88.02 Section 301+25%
Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in…
China2 listed products
9903.88.03 Section 301+25%
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided…
China4 listed products
9903.90.08 Country provisionsSee heading
Articles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter
Russia1 listed product

HTS	Description	General	Column 2
3811.11	Based on lead compounds:
3811.11.10.00	Based on tetraethyl lead or on a mixture of tetraethyl lead and tetramethyl lead	Free	30%
3811.11.50.00	Other	Free	25%
3811.19.00.00	Other	6.5%	3.7¢/kg + 60%
3811.21.00.00	Containing petroleum oils or oils obtained from bituminous minerals	6.5%	60%
3811.29.00.00	Other	6.5%	25%
3811.90.00.00	Other	6.5%	3.7¢/kg + 60%