The Island Regulatory and Appeals Commission has approved increases in gas, diesel and furnace oil prices on PEI. The price of regular gasoline increased overnight by 2.0 cents per litre. The price of furnace oil went up by 4.0 cents per litre, while the price of diesel increased by 4.0 cents per litre. Including taxes, pump prices for regular self-serve gasoline now range from 173.0 to 174.1 cents per litre. Diesel costs you 182.4 to 183.5 cents per litre. The maximum price for furnace oil is 126.0 cents per litre.