N.B. Gas Prices Up This Week Saint John, NB, Canada / Country 94 Tara Clow Nov 28, 2019 | 10:29 AM Robert Geiger / CC After weeks of decreases, the cost of gas rose overnight. The Energy and Utilities Board increased the maximum price of regular self serve by 1.8 cents a litre. Diesel and furnace oil are also up by almost a penny.