Wouldn't the answer be the same that is applied to the question of why gas is so expensive in the first place- refining? I imagine it takes time to refine, and it will be a while before oil refined now hits the market. I don't buy that argument, but that's all we've heard when people question why gas costs so much in the first place and criticize the oil companies for price gouging. I suspect it's really the same phenom that affects grocery prices- 'price stickiness'. (Greed).
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