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.
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.