Calgary gas prices jump as much as 20 cents overnight

Despite the low price of oil, retail gas prices have jumped considerably overnight at some Calgary gas stations.  According to GasBuddy.com, the average price for regular unleaded gas in Calgary late Thursday morning was 70.2 cents per litre, but some stations are still charging as low as 54.9 cents per litre.  Some energy analysts suggest the increase at the pumps has to do with the price of oil and consumption slowly starting to increase in the United States.  The price of crude