§306.5. Automotive fuel rating. — Inbound Citations

(c) In the case of gasoline, if you do not blend the gasoline with other gasoline, you must post the octane rating of the gasoline consistent with the octane rating certified to you. If you blend the gasoline with other gasoline, you must post consistent with your determination of the average, weighted by volume, of the octane ratings certified to you for each gasoline in the blend, or consistent with the lowest octane rating certified to you for any gasoline in the blend. Whether you blend gasoline or not, you may choose to post the octane rating of the gasoline consistent with your determination of the octane rating according to the method in § 306.5. In cases involving gasoline, the octane rating must be shown as a whole or half number equal to or less than the number certified to you or determined by you.

You must keep for one year any delivery tickets or letters of certification on which you based your posting of automotive fuel ratings. You also must keep for one year records of any automotive fuel rating determinations you made according to § 306.5. These records may be kept at the retail outlet or at another, reasonably close location. They must be available for inspection by Federal Trade Commission and Environmental Protection Agency staff members or by persons authorized by FTC or EPA.

(a) In the case of gasoline, if you do not blend the gasoline with other gasoline, you must certify the gasoline's octane rating consistent with the octane rating certified to you. If you blend the gasoline with other gasoline, you must certify consistent with your determination of the average, weighted by volume, of the octane ratings certified to you for each gasoline in the blend, or consistent with the lowest octane rating certified to you for any gasoline in the blend. Whether you blend gasoline or not, you may choose to certify the octane rating of the gasoline consistent with your determination of the octane rating according to the method in § 306.5. In cases involving gasoline, the octane rating may be rounded to a whole or half number equal to or less than the number certified to you or determined by you.

You must keep for one year any delivery tickets or letters of certification on which you based your automotive fuel rating certifications. You must also keep for one year records of any automotive fuel rating determinations you made according to § 306.5. They must be available for inspection by Federal Trade Commission and Environmental Protection Agency staff members, or by persons authorized by FTC or EPA.

(3) ASTM D2699-15a, Standard Test Method for Research Octane Number of Spark-Ignition Engine Fuel, published November 2015; IBR approved for §§ 306.0(b) and 306.5(a).