Big-truck engines perform as well when running on B20 biodiesel as with No.2 ultra-low-sulfur diesel, a yearlong study by a Purdue University team reveals. B20 is a blend of 20% vegetable oil (usually from soybeans) and 80% mineral diesel. “In terms of performance, reliability and maintenance costs, it was basically a wash,” says John Lumkes, assistant professor of agricultural and biological engineering, who led the study. Two 10-vehicle truck fleets with the same engines with similar ...

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