You are here: U.S.: overview of gasoline quality specifications in PADD 2 statesPart 3: State gasoline quality regulations in PADD 2 states3.M: South Dakota
3.M: South Dakota
South Dakota has one conventional gasoline formulation. Fuel quality regulation is the responsibility of the state’s Department of Public Safety.
The state’s fuel quality regulations adopt ASTM D4814 Standard Specification for Automotive Spark-Ignition Engine Fuel as the state’s gasoline standard. However, they also include additional provisions:
    •Differentiated octane requirements within the state:
      •In Butte, Custer, Fall River, Harding, Lawrence, Meade, Oglala Lakota, Pennington, and Perkins counties, per-grade minimum Anti-Knock Index (AKI) limits of 85 (regular), 87 to 90 (midgrade, plus, or super unleaded) and 91 (premium, supreme, high test unleaded)
      •Everywhere else (i.e. the state’s other 57 counties) limits of 87 (regular), AKI limits of 89 (midgrade, plus, or super
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3.M: South Dakota