AAA Michigan says gas prices statewide have jumped by about 50 cents in the past week.
Gas prices in Michigan had fallen for five straight weeks. The sharp increase follows the unexpected, partial shutdown of a large Indiana oil refinery earlier this month.
AAA Michigan says the average price of self-serve regular unleaded gasoline was about $3 per gallon on Sunday, down about 50 cents from the same point a year ago.
The Dearborn-based auto club surveys daily fuel prices at 2,800 gas stations across the state. The lowest average price was about $2.92 per gallon in the Saginaw/Bay City/Midland area, while the highest average was about $3.03 in the Detroit area.
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