I'm doing a couple of long-distance trips per year, either within QC province and often to Ontario.

I've noticed that:
1) Within urban areas, the price is considerably higher (10-20ct higher than in the middle of nowhere). Property taxes in the cities?
2) Some stations within the city are consistently cheaper once prices are dropping again. Example in Montreal: the Maxi and Canadian Tire in Pointe-St-Charles (next to highway 15) can be as low as 1$ when on the other side of the Lachine canal the prices might easily be 10ct higher and on the other side of the city 15ct higher.
3) Costco often skips a price hike.

And you people should check out the app GasBuddy!