What is the standard meaning of a 'barrel' in fuel terminology?

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What is the standard meaning of a 'barrel' in fuel terminology?

Barrel in fuel terminology is a standard unit equal to 42 US gallons. This convention is used for crude oil and many refined products, providing a consistent basis for pricing, invoicing, and inventory across the energy industry. In liters, that's about 159 L (42 × 3.785). The other volumes refer to different containers or conversions: 55 gallons is a drum, not a barrel; 32 gallons equals 128 quarts, which is not the standard barrel; 128 quarts equals 32 gallons, again not the standard barrel. Thus, the standard meaning is 42 US gallons.

Barrel in fuel terminology is a standard unit equal to 42 US gallons. This convention is used for crude oil and many refined products, providing a consistent basis for pricing, invoicing, and inventory across the energy industry. In liters, that's about 159 L (42 × 3.785). The other volumes refer to different containers or conversions: 55 gallons is a drum, not a barrel; 32 gallons equals 128 quarts, which is not the standard barrel; 128 quarts equals 32 gallons, again not the standard barrel. Thus, the standard meaning is 42 US gallons.

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