From oil patch to gas pump: This is why it costs so much to fill your gas tank

When gas prices spike, the pain to your pocketbook can feel close to home, but the forces driving the increases are anything but local.Even in a country that produces more oil than it consumes — Canada is the world’s fourth-largest oil producer — the price Canadians pay at the pump is shaped by a global system that stretches from Mideast shipping routes to Wall Street trading floors.The price of gasoline isn’t a single figure decided overnight, but rather a sum of moving numbers that begins with the price of oil.

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