Does HTS 3811 fit your product?
This is the fastest way to use the page: compare the exact commercial description with the legal wording, then check the closest child or sibling provision. A valid code is not automatically the right code for every product in the same category.
- The product must match the tariff wording: 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:.
- This level has 5 more specific provisions; do not stop here if a child description fits better.
- The displayed duty is not stated at this level; origin programs, trade remedies, quotas and taxes may change the final amount.
What does HTS 3811 cover?
This provision appears in the 2026 Harmonized Tariff Schedule of the United States under the following legal tariff hierarchy.
- 1Antiknock 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:
More specific provisions
Choose a child provision when its description matches a measurable product fact such as material, capacity, use or construction.