AAA Michigan says gas prices statewide have dropped about 10 cents in the past week.
The Dearborn-based auto club says the average price for self-serve regular unleaded gasoline was about $2.26 per gallon on Sunday.
That's about $1.24 less than at the same point a year ago.
According to AAA Michigan, gas prices have fallen four weeks in a row.
The auto club surveys daily fuel prices at 2,800 gas stations across the state.