What we see here is a conspiracy. Drive along the city and see THE SAME price. ESSO-SHELL-PETRO CANADA...How do they keep the same price? Do the have the same costs? I doubt.
Conspiracy? Haha, OK dude, back away from the diesel fumes! Costs would be very similar, yes. I buy potato chips from Wal-Mart, and from Superstore. They are the same price! Even from different brands! Is this evidence of a potato chip conspiracy? No.
The fuel prices are definitely not all the same across the city, I see a lot of variation in Calgary. The fuel in my town just outside Calgary is consistently cheaper than in Calgary too. If this was a conspiracy, why sell cheaper here?
Why our gas price is the same as in countries WITHOUT a drop of own oil?
Huh? Ours is way cheaper than most of the world. What country has no oil and pays less for fuel?
Why does Canada export oil to US if we have short "supply"?
We are not short of supply of oil, that's why we can sell it to the US. Don't confuse crude oil with refined fuel.
Why gas in US has lower price than in Canada?
Lower Taxes for one thing.
Three years ago I filled diesel at $0.80/L and now it is $1.30/L. Do you see 162,5% growth of diesel cars on the road compare to three years ago? Me too...
Three years ago oil fell to $30 a barrel. Here is a Wikipedia link:
http://en.wikipedia.org/wiki/Price_of_petroleum (Not a great source, I know, but the article is cited.) We are now back up over $100 a barrell and still our fuel is very cheap compared to the worldwide average.
Farmers in Vancouver? Gimme a break. Why "supply" goes down?
That was a local (to me) example. Here's a Vancouver one: Shipping and freight increases in the Spring, what do ships and trains run on? There are all kinds of seasonal industry that could have this effect. Anyway, the whole point was just to show the cost/supply relationship, and how quickly it changes, not to prove what happens in your area.