UNDATED (WKZO) -- Gas Prices are down 15-cents nationally in the last two weeks according to the Lundberg Survey and down even more than that in the last week inMichiganaccording to Triple A.  Will they stay that way as we head for what is shaping up to be a big holiday week? 

Nobody really knows but if you can fill up early, why wait?  Nancy Cain at AAA of Michigan says gas prices are reacting to the drop in crude oil prices.   Some retailers are selling gas for a nickel or dime less than this time last year.   She says its good news for holiday travelers.  She says barring any hurricanes, disruption in shipping from theMiddle Eastor some other unforeseen calamities at refineries, they should continue to fall through the summer.