Depending on where you live in Canada the spread from regular to premium gasoline in the wholesale price for gas stations ranges between 6 and 11 cents a litre. However many stations charge a difference of 32 cents a litre between the two blends. The wider difference commonly seen in pump’s prices between regular and premium, is the markup gas stations charge minus GST/HST and the wholesale price difference. For a more complete explanation see:
From Our FAQs:
Winter gas prices start around September 15th, when gas stations switch from the more expensive summer blend to the cheaper winter blend. The switch is driven by government regulations and the fact that winter gasoline is less expensive to produce because it contains more butane, which is cheaper and helps engines start in cold weather.
- September 15th: This is the typical start date for the switch to winter-blend gasoline in mainland North America, following EPA regulations.
- Price drop: You will generally see lower gas prices shortly after this date as stations use the cheaper winter fuel.
- Cheaper blend: Winter gasoline is cheaper to produce than summer-blend, which has higher-cost additives to reduce evaporation and smog during warmer months.
- Butane’s role: Winter gas contains more butane, an inexpensive component that helps a vehicle’s engine ignite and start in colder temperatures.