At the stations I mentioned they have a sticker on 89 and 91 octane that there is up to 10% ethanol and no sticker on the premium. I'm not sure about Petrocan but I do know if you go far enough north in Ontario stations have no ethanol in their gas. The reason why some have ethanol free premium and up north no ethanol is because there is not enough ethanol to go around and they even have to import some
from another forum..
"Torpedo Fishing Products for the past 2 years have been pushing Canadian Tire gas to provide ethanol free gas for all three gas grades. The benefits to Canadian Tire Gas outlets is not having to check twice a day for water levels in the main tank which is a huge cost when considering it is a nation wide company.
The main issue was with the government as they have an agenda for ethanol. A loophole was found as not enough ethanol is being produced in Canada to provide all gas stations with 10% ethanol, so ethanol would have to be bought from outside Canada. As some have known Shell gas has taken advantage of this loophole by providing ethanol free gas in their premium blend.
After extensive government talks, it was agreed that Canadian Tire must provide Ethanol gas for 12 locations while the rest can be ethanol free. This will last until Canada produces enough ethanol satisfy it's agenda.
I have checked all of the Canadian Tire gas bars in London Ontario and all are ethanol free.
Here is how you check. First you can ask the attendant how often they check their gas for water. If they tell you twice a day then that gas station has not converted to ethanol free gas. If they check the tanks once a week or once every two weeks then that gas station has changed over to ethanol free gas at all blends. The other way to check for your own personal satisfaction is as follows. Take a 500ml water bottle and leave 1.5 inches of water in the bottle and mark that water line with a magic marker. Then fill the water bottle with gas to 3/4's full. Then shake the water bottle. Let the fluid settle and if the water level has risen then there is ethanol. If the water level stays the same then you have ethanol free gas. "