CFR Engines Inc. Aviation Fuel Rating Unit

Supercharge Method

Model: F4

Originally developed in 1941 for US military applications, the CFR F4 Aviation Fuel Rating Unit today is the globally accepted standard for determining the octane quality of aviation gasoline and aviation gasoline blending components. For more information about the aviation fuel rating engines, please contact us at

ASTM D909: Standard Test Method for Supercharge Rating of Spark-Ignition Aviation Gasoline

IP 119: Knock Characteristics of aviation gasolines by the supercharged method

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