If you're thinking about filling up those gas tanks, hold off another week.
Industry analysts are warning people that gas prices are expected to drop 15 to 30 cents by next Wednesday. Michigan, Indiana, Illinois and Wisconsin are expected to have the most relief in gas prices. Last week, Michigan was ranked at number two in the country, following Hawaii, with the highest average gas prices at $4.25. Problems and maintenance projects at refineries affected the gas prices in Michigan and surrounding states. As of yesterday, AAA reported that the state's average price was at $4.18.