Gas Prices Drop Slightly Saint John, NB, Canada / Country 94 News Sep 23, 2010 | 2:13 AM You will be paying a bit less for gas after the weekly setting. Self serve regular is now at 96.5 a litre in the city with diesel at $103.3. Propane did go up with the maximum price listed at 104 a litre. Heating oil remains the same at 90.4 cents.