As you can see in the long term chart below, oil is a volatile commodity, with it's price swinging wildly in a range from less than 1 gram per barrel to almost 5 grams per barrel. But this chart also shows that these oscillations are part of a sideways price movement centered around 2.5 grams per barrel. Crude's current price around 1.5 grams is quite a bit below its historical average.

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