Heading · Chapter 38

3811: 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

5 subheadings make up heading 3811 in chapter 38 (miscellaneous chemical products).

Duty rates compared

UK 4% – 6% Third-country duty 57 tariff lines · average 4%

EU 5.3% – 6.5% Third-country duty 6 tariff lines · average 5.8%

Türkiye 5.3% – 6.5% Third-country duty 11 tariff lines · average 5.8%

USA Free – 6.5% General (MFN) 6 tariff lines · average 4.3%

Subheadings 5

3811.11Based on lead compounds UK 4%–6% · EU 5.8%–6.5% · Türkiye 5.8%–6.5% · USA Free
3811.19Anti-knock preparations, oxidation inhibitors: anti-knock preparations, other UK 4% · EU 5.8% · Türkiye 5.8% · USA 6.5%
3811.21Containing petroleum oils or oils obtained from bituminous mineralsLubricating oil additives (with petroleum oil) UK 4% · EU 5.3% · Türkiye 5.3% · USA 6.5%
3811.29Additives for lubricating oils: other UK 4% · EU 5.8% · Türkiye 5.8% · USA 6.5%
3811.90Anti-knock preparations, oxidation inhibitors: otherOther fuel and oil additives UK 4% · EU 5.8% · Türkiye 5.8% · USA 6.5%

EU: imports by month

last 12 months€848.6m-9.2% · previous 12 months

Average import price€3.63 per kg

Data up to August 2026 (provisional) · Monthly data: Eurostat Comext (CC BY 4.0), HMRC (OGL v3.0)

World trade in 2024

3811 · US$14.1bn

Trade value (US$) no reported trade < US$470.1kUS$470.1k+US$12.3m+US$167m+> US$998m

Exports: 145

United States: US$3.1bn
France: US$2.5bn
Singapore: US$2bn
Italy: US$1.2bn
Germany: US$998m
Belgium: US$948.7m
China: US$939.1m
India: US$407.1m
Japan: US$279.7m
Netherlands: US$245.6m
United Kingdom: US$231.9m
South Korea: US$195.6m
Canada: US$186.2m
Mexico: US$167m
Brazil: US$85.9m
United Arab Emirates: US$75.5m
Spain: US$46.2m
Australia: US$34m
Slovakia: US$28.1m
Taiwan: US$28m
Thailand: US$26.5m
Austria: US$25.9m
Russia: US$24.5m
Switzerland: US$24.3m
Azerbaijan: US$24.3m
Sweden: US$22m
Poland: US$18.4m
Denmark: US$17.1m
South Africa: US$15.7m
Czechia: US$15.5m
Hungary: US$12.7m
Greece: US$12.6m
Hong Kong SAR China: US$12.5m
Türkiye: US$12.5m
Philippines: US$12.3m
Malaysia: US$11.6m
Senegal: US$10.6m
Indonesia: US$10.5m
Saudi Arabia: US$9.9m
Lithuania: US$8.7m
Norway: US$7.9m
Belarus: US$6.8m
Slovenia: US$6.2m
Romania: US$6.1m
Colombia: US$6m
Portugal: US$4.7m
Croatia: US$4.5m
Latvia: US$4.3m
Guatemala: US$3.3m
Kazakhstan: US$3.2m
Serbia: US$3.2m
Egypt: US$3.1m
Vietnam: US$2.7m
New Zealand: US$2.4m
Israel: US$2m
Chile: US$1.8m
Finland: US$1.8m
Argentina: US$1.5m
Estonia: US$1.4m
Ukraine: US$1.1m

Top exporters

Rank	Country	Value	Share
1	United States	US$3.1bn	21.9%
2	France	US$2.5bn	17.8%
3	Singapore	US$2bn	14.4%
4	Italy	US$1.2bn	8.2%
5	Germany	US$998m	7.1%
6	Belgium	US$948.7m	6.7%
7	China	US$939.1m	6.7%
8	India	US$407.1m	2.9%
9	Japan	US$279.7m	2%
10	Netherlands	US$245.6m	1.7%

Top importers

Rank	Country	Value	Share
1	China	US$988.4m	7%
2	Singapore	US$882.1m	6.3%
3	Belgium	US$858.3m	6.1%
4	United States	US$816.2m	5.8%
5	France	US$814.2m	5.8%
6	Germany	US$794m	5.6%
7	South Korea	US$512.8m	3.6%
8	Italy	US$510.3m	3.6%
9	United Arab Emirates	US$474.4m	3.4%
10	Netherlands	US$432.4m	3.1%

In the UK Global Tariff, heading 3811 covers 57 tariff lines and the duty is between 4% and 6%.

The EU Combined Nomenclature divides heading 3811 into 6 tariff lines; the duty is between 5.3% and 6.5% (average 5.8%).

In the Turkish Customs Tariff Schedule, heading 3811 covers 11 tariff lines and the duty is between 5.3% and 6.5%.

The Harmonized Tariff Schedule of the United States divides heading 3811 into 6 tariff lines; the duty is between 0% and 6.5% (average 4.3%). 2 of them are duty-free.

World trade in heading 3811 goods reached US$14.1bn in 2024, down 2.2% on 2023.

The United States was the largest exporter with 21.9% of the total, ahead of France.

China imported the most (US$988.4m).

The United Kingdom ranked 11th among 145 exporters with US$231.9m.

The United Kingdom imported US$194m.

Products classified here

Questions and answers

What is the HS code for 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?

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 fall under HS heading 3811, part of chapter 38, in section VI of the Harmonized System.

What is the import duty on anti-knock preparations, oxidation inhibitors… in the UK?

Under the UK Global Tariff, imports under 3811 from countries without a preferential agreement are charged at 4% to 6%, depending on the line. Preferential rates, anti-dumping duties and VAT are not included.

What is the import duty on anti-knock preparations, oxidation inhibitors… in the EU?

Under the EU Combined Nomenclature, imports under 3811 from countries without a preferential agreement are charged at 5.3% to 6.5%, depending on the line. Preferential rates, anti-dumping duties and VAT are not included.

Which country exports the most anti-knock preparations, oxidation inhibitors…?

The United States, with US$3.1bn in 2024 (21.9% of world exports).