DETROIT AAA Michigan says gas prices have dropped four-tenths of a penny over the last week, putting the statewide average at $3.86 a gallon.
The state auto club said Monday that of the cities it surveys, the cheapest price for self-serve regular fuel is in the Flint, Grand Rapids and Saginaw/Bay City areas, where a gallon costs $3.82. The highest average can be found in the Marquette area at $4.
The statewide average for biodiesel is $4.62 and $3.40 for ethanol.
AAA surveys 2,800 Michigan gas stations daily.