Related Clues:

• Oil meas.
• Barrel, abbr.
• Crude measurement: Abbr.
• Five cu. ft. of sugar
• Crude oil meas.
• OPEC unit: Abbr.
• 42 gal.
• Peak oil meas.
• Crude amt
• Oil qty
• Crude meas
• Marathon unit: Abbr
• Unit of oil production (Abbr.)
• OPEC meas
• Oil container (abbr.)