automotive fuel rating
(17) The term “automotive fuel rating” means— (A) the octane rating of an automotive spark-ignition engine fuel; and (B) if provided for by the Federal Trade Commission by rule, the cetane rating of diesel fuel oils; or (C) another form of rating determined by the Federal Trade Commission, after consultation with the American Society for Testing and Materials, to be more appropriate to carry out the purposes of this subchapter with respect to the automotive fuel concerned.