The medium-grade blend in Ontario right now is problematic. That is a function of the Government of Ontario's specifications on renewable fuels.
As Ms. Savage explained, you cannot take regular, unleaded gasoline that has ethanol in it and mix it at the pump with high grade to get medium grade, because the chemistry just doesn't work. It's not a product that would be useful in the marketplace. It has to do with reed vapour pressure.
He's the engineer and I'm the economist. Perhaps he wants to explain what we mean.
The point is that it's not a desirable product. That is probably going to manifest itself at least in the short term as all fuel suppliers are moving up to the renewable fuel mandate set by the Government of Ontario, which came into effect only this year.