You are here: U.S.: overview of gasoline quality specifications in PADD 2 statesPart 3: State gasoline quality regulations in PADD 2 states3.L: Oklahoma
3.L: Oklahoma
Fuel quality in Oklahoma is enforced by the Oklahoma Corporation Commission. The Commission adopts a very basic, truncated set of quality requirements for gasoline. It does not adopt ASTM D4814 Standard Specification for Automotive Spark-Ignition Engine Fuel, nor does it adopt National Institute of Standards and Technology Handbook 130 as its gasoline standard. The applicable quality requirements are:
    •Appearance that is “free of undissolved water, sediment, and suspended matter,” and “clear and bright at the ambient temperature or 70° F [21.1° C], whichever is higher.”
    •Gum content limit of 5 mg/100 ml
    •Two sets of octane requirements according to region:
      •In areas west of 99° longitude, Anti-Knock Index (AKI) values of 86 or 87 (regular), 88 or 89 (plus, midgrade) and 90 or abo
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3.L: Oklahoma