US oil barrels
A US oil barrel, also known as a petroleum barrel, is a volume unit used in the oil and gas industry to measure crude oil or liquid petroleum gas (LPG). One US oil barrel is 42 US gallons or about 159 liters.
UK quarts
A UK quart is a unit of volume in the United Kingdom. One UK quart is a quarter of a UK gallon at about 1.13652 liters.