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HTS 3811.90.00.00
Antiknock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti…
Description
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 > Other
| General duty (most countries) | 6.5% |
|---|---|
| Trade-deal rates | Free (A+,AU,BH,CL,CO,D, E,IL, JO,KR,MA,OM,P, PA,PE,S,SG) |
| Column 2 (Cuba, North Korea, Russia, Belarus) | 3.7¢/kg + 60% |
| 6-digit HS code (international) | 3811.90 |
Estimated US duty by country of origin
Base rate plus the additional tariffs that apply today (China Section 301, the 2026 country tariff). Steel, aluminium and some other goods can owe more.
| Made in | Estimated duty | Made up of |
|---|---|---|
| China | 44% | 6.5% base · +25% China Section 301 List 3 · +12.5% 2026 country tariff |
| Vietnam | 19% | 6.5% base · +12.5% 2026 country tariff |
| India | 16.5% | 6.5% base · +10% 2026 country tariff |
| Bangladesh | 16.5% | 6.5% base · +10% 2026 country tariff |
| Pakistan | 16.5% | 6.5% base · +10% 2026 country tariff |
| Türkiye | 19% | 6.5% base · +12.5% 2026 country tariff |
| Mexico | 16.5% | 6.5% base · +10% 2026 country tariff Free under USMCA if the product qualifies |
| Canada | 16.5% | 6.5% base · +10% 2026 country tariff Free under USMCA if the product qualifies |
| United Kingdom | 16.5% | 6.5% base · +10% 2026 country tariff |
| Germany | 10% | 6.5% base · +3.5% 2026 country tariff (total at least 10%) |
| Italy | 10% | 6.5% base · +3.5% 2026 country tariff (total at least 10%) |
| Taiwan | 10% | 6.5% base · +3.5% 2026 country tariff (total at least 10%) |
| Japan | 12.5% | 6.5% base · +6% 2026 country tariff (total at least 12.5%) |
| South Korea | 12.5% | 6.5% base · +6% 2026 country tariff (total at least 12.5%) Free under US–Korea FTA if the product qualifies |
| Thailand | 19% | 6.5% base · +12.5% 2026 country tariff |
| Indonesia | 16.5% | 6.5% base · +10% 2026 country tariff |
Other codes under heading 3811
- 3811.11.10.00 · FreeAntiknock preparations > Based on lead compounds > Based on tetraethyl lead or on a mixture of tetraethyl lead and tetramethyl lead
- 3811.11.50.00 · FreeAntiknock preparations > Based on lead compounds > Other
- 3811.19.00.00 · 6.5%Antiknock preparations > Other
- 3811.21.00.00 · 6.5%Additives for lubricating oils > Containing petroleum oils or oils obtained from bituminous minerals
- 3811.29.00.00 · 6.5%Additives for lubricating oils > Other
Official US Harmonized Tariff Schedule, version of 2026-11-03.