Harmonized System
U.S. exports of prepared additives for mineral oils and similar liquids (nesoi) (HS 381190) totaled $107.0M in August 2026.
Importers of Prepared Additives for Mineral Oils and Similar Liquids (NESOI) paid $1.3M in duties in August 2026, an effective tariff rate of 10.52% of the $11.9M imported — duty actually collected as a share of that value, not the published tariff schedule. Prepared Additives for Mineral Oils and Similar Liquids (NESOI) imports of $11.9M in August 2026 ran 27% above the year-to-date monthly average of $9.4M.
Last updated: August 2026 dataPrepared additives for gasoline, diesel, and other mineral-oil-based liquids not covered by the lubricating oil additive headings are classified under 3811900000, capturing a broad range of fuel performance chemicals including cetane improvers, corrosion inhibitors, and deposit-control additives. Germany and India are the leading US import sources, with the United Kingdom, Canada, and Mexico also supplying significant volumes — a supplier mix that reflects both European specialty chemical leadership and North American blending proximity. Importers should verify that fuel additive formulations destined for US motor fuel blending carry valid EPA fuel additive registrations, as the registration requirement applies regardless of the additive's country of origin.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
162 shipments/mo
This line captures additives formulated for gasoline, diesel, aviation fuel, or other mineral-oil-based liquids used for the same purpose — such as cetane improvers, fuel system deposit-control additives, corrosion inhibitors for fuel tanks, and demulsifiers. Products specifically designed to improve the performance of lubricating oils fall under 381121 or 381129 depending on their carrier oil composition.
Yes. Multi-function additive packages that combine, for example, an antioxidant with a corrosion inhibitor and a detergent can be difficult to classify if the primary function is not clearly documented. CBP generally classifies such mixtures by the component that imparts the essential character, but when functions are co-equal, the heading that appears last in the tariff schedule may govern. A binding ruling from CBP is advisable for complex formulations.
HSChapter 38
Trade Directory
List your company under HS 381190 — Prepared Additives for Mineral Oils and Similar Liquids (NESOI), so the companies trading it can find you. Be the first supplier listed.
Subheading 2 of 5 in heading 3811
Subheading 381190 · $107.0M of $311.0M
ImportsExports
Imports
$11.9MYoY · free account
Exports
$107.0MYoY · free account
12-mo low · imports
YoY · free accountOver the twelve months to August 2026, the U.S. imported $119.7M of Prepared Additives for Mineral Oils and Similar Liquids (NESOI).
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3811900000 | Additives for Lubricating Oils, NESOI | $11.9M | 10.52% | 90.22% | $1.3M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3811900000 | Additives for Lubricating Oils, NESOI | $107.0M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Exports · August 2026
destination
Saudi Arabia and Canada together take 59% of it.
customs district
origin
entry
rate provision · imports
9.8% enters free of duty; duty collected equals 10.52% of total import value.