The average price of self-serve regular gasoline in Michigan is up more than a dime per gallon over the past week and 39 cents over the past four weeks, AAA Michigan said Monday.
The statewide average of $2.91 per gallon is 71 cents higher than a year ago at this time.
The Grand Rapids area has the most expensive gasoline of Michigan's metropolitan areas at $2.93 per gallon, the auto club said.
In the Detroit area, the average increased 10 cents per gallon to $2.89.
Dearborn-based AAA Michigan surveys 2,800 gas stations daily for its report.
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