Gas Prices down 6 cents a Gallon here

When I went to fill up here in on the Northern California Coast I was surprised that gas prices had dropped about 6 cents a gallon at two stations. Though I don't know the reason for this I was glad to see it. The price went from $4.27 a gallon at one station to $4.21. At another station nearby the price had gone from $4.33 to $4.27 a gallon. Both stations were the prices for Regular Gasoline.