NAICS 324191
Overview
The North American Industry Classification System (NAICS) is the federal statistical standard for classifying business establishments to enable consistent collection, analysis, and publication of U.S. economic data. Developed under the Office of Management and Budget with partners in Canada and Mexico, NAICS replaced the Standard Industrial Classification in 1997 to improve cross-country comparability. 1
Under the 2022 NAICS vintage, 324191 covers establishments primarily engaged in blending or compounding refined petroleum to make lubricating oils and greases and/or re-refining used petroleum lubricating oils. Cross-references clarify boundaries with 324110 (petroleum refineries) and 325998 (synthetic lubricants). 2
See also on G2X:
What this NAICS covers
- Blending refined petroleum base stocks to manufacture lubricating oils. 2
- Compounding refined petroleum to produce lubricating greases. 2
- Re-refining used petroleum lubricating oils. 2
- Petroleum-based lubricant production (as distinct from synthetic lubricant manufacturing). 2
- Formulation activities inherent in blending/compounding petroleum oils and greases. 2
Related NAICS and PSC codes
| Type | Code | Descriptor |
|---|---|---|
| NAICS | 324110 | Petroleum Refineries; refining crude petroleum and manufacturing lubricating oils/greases. 2 |
| NAICS | 325998 | All Other Miscellaneous Chemical Product and Preparation Manufacturing; includes synthetic lubricating oils/greases. 2 |
| PSC | 9150 | Oils and Greases: Cutting, Lubricating, and Hydraulic. 5 |
| PSC | 9160 | Miscellaneous Waxes, Oils, and Fats. 5 |
Key exclusions and boundaries
- Crude petroleum refining and integrated refinery production of lubricants belong in 324110, not 324191. 2
- Synthetic lubricating oils and greases are classified in 325998. 2
- Other petroleum and coal products (excluding lubricants and greases) fall under 324199. 6
Placement and data availability
- 324191 resides in NAICS Sector 31–33 (Manufacturing); 2022 Economic Census manufacturing tables are published on the 2022 NAICS basis. 4
- Census economic programs are transitioning to the 2022 NAICS vintage; most will complete adoption by the end of 2027. 3
Frequently asked questions
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What activities are included in NAICS 324191?
Blending or compounding refined petroleum to make lubricating oils and greases, plus re-refining used petroleum lubricating oils. It explicitly covers petroleum-based lubricants; synthetic lubricants are classified elsewhere. Cross-references on the official NAICS page confirm these inclusions. 2
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How does 324191 differ from 325998?
324191 covers petroleum-based lubricant and grease manufacturing, including re-refining used oil. 325998 covers synthetic lubricating oils and greases, such as PAO- or ester-based products manufactured via chemical synthesis. 2
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Are used-oil re-refiners included in 324191?
Yes. Establishments primarily engaged in re-refining used petroleum lubricating oils are explicitly included in NAICS 324191, distinguishing them from crude refineries and synthetic lubricant producers. 2
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Which PSC codes commonly align with petroleum lubricants and greases?
Supply buys often map to 9150 for cutting, lubricating, and hydraulic oils and greases. Some related waxes, oils, or fats may fall under 9160, depending on the specific composition and end use. 5
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What is the current NAICS vintage and what is the transition timeline?
The current vintage is 2022. The Census Bureau began disseminating data on the 2022 basis with the 2022 Economic Census and plans to have most economic programs fully adopted by the end of 2027. 3
Useful resources
- G2X — NAICS 324191 overview
- U.S. Census Bureau — NAICS industry description for 324191. 2
- U.S. Census Bureau — Implementation of the 2022 NAICS (timeline and adoption). 3
- U.S. Census Bureau — 2022 Economic Census, Sector 31–33 (Manufacturing) data tables. 4
References
- U.S. Census Bureau. 2017 North American Industry Classification System (NAICS) Manual (overview and adoption). https://www.census.gov/library/publications/2017/econ/2017-naics-manual.html
- U.S. Census Bureau. NAICS 324191 — Lubricating Oil and Grease Manufacturing (2022 NAICS). https://www.census.gov/naics/?input=324191&year=2022&details=324191
- U.S. Census Bureau. The Census Bureau’s Implementation of the 2022 NAICS (timeline). https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html
- U.S. Census Bureau. 2022 NAICS Sector 31–33 Manufacturing tables. https://www.census.gov/data/tables/2022/econ/economic-census/naics-sector-31-33.html
- General Services Administration. Product and Service Code Manual (April 2025) — Group 91 definitions. https://www.acquisition.gov/psc-manual
- U.S. Census Bureau. NAICS 324199 — All Other Petroleum and Coal Products Manufacturing (2022 NAICS). https://www.census.gov/naics/?input=324199&year=2022&details=324199
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