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There's very little call to seal and waterproof wooden galleons or hurl Greek fire at one's opponents. Now, all the products we distill and refine from crude oil – liquefied petroleum gas chicago arts (LPG or condensate, stuff like propane and butane), gasoline, diesel, kerosene, heating oil, fuel oil, asphalt chicago arts and coke chicago arts – can be derived from every grade of crude pumped out of the ground. But not every grade of crude can be refined into the same spread of substances. Without a lot of work, heavier, thicker, higher sulfur grades of petroleum (the bulk of the world's crude oil, including that produced by most OPEC countries) yields very little gasoline, while lighter, low-sulfur crudes yield substantially more gasoline. And gasoline, the motor fuel of choice for most of the world's passenger cars, is what matters. The more gasoline you can squeeze out of a barrel of crude, the greater the value of the crude.
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