Diesel or diesel fuel

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Diesel or diesel fuel :

 in general is any fuel used in diesel engines. The most common is a specificfractional distillate of petroleum fuel oil, but alternatives that are not derived from petroleum, such as biodiesel,biomass to liquid (BTL) or gas to liquid (GTL) diesel, are increasingly being developed and adopted. To distinguish these types, petroleum-derived diesel is increasingly called petrodiesel. Ultra-low sulfur diesel (ULSD) is a standard for defining diesel fuel with substantially lowered sulfur contents. As of 2007, almost every diesel fuel available in America and Europe is the ULSD type.