research octane number

The terms “research octane number” and “motor octane number” have the meanings given such terms in the specifications of the American Society for Testing and Materials (ASTM) entitled “Standard Specification for Automotive Spark-Ignition Engine Fuel” designated D4814 (as in effect on June 19, 1978) and, with respect to any grade or type of automotive gasoline, are determined in accordance with test methods set forth in ASTM standard test methods designated D 2699 and D 2700 (as in effect on such date).