GRAND RAPIDS (WKZO) -- Gas prices could hit four-dollars and 25-cents a gallon in the next two months in west Michigan.  That prediction is coming from GasBuddy.com analyst Greg Laskoski, who blames this week's 20-cent spike in gas prices on a rise in crude oil and uncertainty over a few Midwestern oil refineries.  Gas prices will move higher in the spring when summer blends of gas begin to be used, as those cost more to produce.