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:
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According to the Canadian Taxpayers Federation, the federal carbon tax adds 11 cents per litre for gasoline. This means that if the tax is dropped, you could save 11 cents for every litre of gasoline you buy. For example, if you fill up a 50-litre tank, you could save $5.50. However, this is only an estimate, and the actual savings may vary depending on other factors, such as provincial taxes, market prices, and regional differences.