Title 15 › CHAPTER 55 — PETROLEUM MARKETING PRACTICES › SUBCHAPTER II — OCTANE DISCLOSURE › § 2821
Gives plain meanings for key words used in this part of the law. It explains measurements for fuel and who the words cover. Octane rating: the fuel antiknock score, equal to half the sum of the research octane number and the motor octane number, unless a different method is set under section 2823(c)(3). Research octane number and motor octane number: defined by the ASTM specification D4814 as of June 19, 1978, and measured by ASTM test methods D2699 and D2700 as of that date. Knock: fuel burning by itself in part of a cylinder instead of from the spark. Automotive fuel retailer: someone who sells fuel to the public for use. Refiner: someone who makes or imports automotive fuel. Automotive fuel: liquid fuel sold for motor vehicles. Motor vehicle: a self‑propelled four‑wheeled vehicle under 6,000 pounds gross weight, made mainly for public roads. New motor vehicle: a vehicle whose legal or equitable title has not been transferred to an ultimate purchaser. Ultimate purchaser: the first buyer who does not intend to resell. Manufacturer: a person who imports, makes, or assembles vehicles for sale. Automotive fuel requirement: the minimum fuel rating a manufacturer recommends to avoid knocking. Model year: the maker’s annual production period as set by the Federal Trade Commission, or the calendar year if none. Commerce: trade between any State and places outside it, or trade that affects such trade. State: U.S. States, the District of Columbia, Puerto Rico, the Virgin Islands, American Samoa, Guam, and other U.S. territories or possessions. Person: includes partnerships and corporations for applying the Federal Trade Commission Act here. Distributor: someone who receives fuel and sells it to others who are not the ultimate purchaser. Automotive fuel rating: the octane rating, and, if the FTC allows, the cetane rating for diesel or another FTC‑chosen rating after consulting ASTM. Cetane rating, cetane index, and cetane number: measures of diesel ignition quality, defined by ASTM methods D976 or D4737 (cetane index) and D613 (cetane number), and applied to diesel grades in ASTM D975 as of October 24, 1992.
Full Legal Text
Commerce and Trade, Source: USLM XML via OLRC
Legislative History
Reference
Citation
15 U.S.C. § 2821
Title 15, Commerce and Trade
Last Updated
Sep 23, 2026
Release point: 119-110