The price I put was 91 octane which is what I use. At 84 octane, it's about 1.45 CAD to gallons is 5.38 CAD for a gallon and CAD is stronger than USD so it's 5.40 $ USD.
Look at the attached. The government is the reason for the high cost of gas. http://www.quebeccitygasprices.com/can_tax_info.aspx. We pay 15% sales tax on top of the fees attached.
They have adjusted by using half gasoline/half propane engines.