The yield of diesel fuel from a barrel of crude oil depends on various factors, such as the crude oil's composition, the refining process, and the desired product specifications. On average, about 20-25% of a barrel of crude oil is refined into diesel fuel. This means that one barrel of crude oil can produce approximately 42 to 53 gallons of diesel fuel.
Different crude oil sources and refining processes can result in variations in the diesel yield. However, the given percentages provide a general estimate of the amount of diesel obtained from a barrel of crude oil.