If we look at volumes, they depend on production, they depend on demand. The more people ask for gasoline, the more will be refined, we hope one day. And there's also thermodynamics.
I am a cross-border driver. I drive heavy equipment, I drive cars.... It is common knowledge among most Quebec drivers, be they bus drivers, truck drivers, or snow birds, that you can go seven to nine kilometres farther on a gallon of American gas than on a gallon of Canadian gas. Most people attribute that to the difference in additives. Some additives are illegal in Canada, like molybdenum, and some additives are legal in the States only. This difference is stretching the mileage and therefore reducing the demand accordingly. Is this true?