Since 2004 Saudi Aramco has been fighting declining oil output from megafields like 70-billion-barrel Ghawar by doubling the number of drilling rigs to 120 this year.

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Since 1999, the five-fold increase in the number of dollars it takes to buy a barrel of oil has simply caught up to the five-fold increase in the number of dollars it takes to buy an ounce of gold.

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Further the number of gallons of gasoline produced per barrel heavy crude oil is lower than for light crude oils.

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Apparently you need three barrels of Saudi crude to get the same number of barrels of diesel you could get from one Libyan barrel.

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This number dictates the ratio between the pen cap and visible portion of the barrel.

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Still, a number of things could go wrong from a fuse malfunctioning, a problem with the barrel's assembly to a round prematurely detonating inside the tube, he said.

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