3.F: Michigan

Michigan has one conventional gasoline formulation, and one low-RVP gasoline formulation. The latter is required in the Detroit metro area, defined as Lenawee, Livingston, Macomb, Monroe, Oakland, St. Clair, Washtenaw, and Wayne counties. Fuel quality regulation is the responsibility of the state’s Department of Agriculture and Rural Development (MDARD).

The state’s fuel quality regulations refer to ASTM International’s Standard Specification for Automotive Spark-Ignition Engine Fuel, version D4814-08b. Additionally, the state sets per-grade minimum Anti-Knock Index (AKI) limits for the following:

The state grants a