Barrel (unit) continued to use the same size barrels. In the worldwide oil industry, an oil barrel is defined as 42 US gallons, which is about litres or 35 imperial gallons. Oil companies that are listed on American stock exchanges typically report their production in terms of volume and use the units of bbl, Mbbl (one thousand barrels), or MMbbl (one million barrels) and occasionally for widest comprehensive statistics the Gbbl (or sometimes Gbl) denoting a billion. There is a conflict concerning the units for oil barrels (see ). For all other physical quantities, according to the International System of Units, the
Imperial Oil the sale agreement, these stations also continue to participate in PC Optimum. Imperial Oil Imperial Oil Limited "(French: L'Impériale)" is a Canadian petroleum company. It is Canada's second-biggest integrated oil company. Exxon Mobil Corp. has a 69.6 percent ownership stake in the company. It is a significant producer of crude oil, diluted bitumen and natural gas, Canada’s major petroleum refiner, a key petrochemical producer and a national marketer with coast-to-coast supply and retail networks. Its retail operations include Esso-brand service stations and On the Run/Marché Express and Tiger Express-brand convenience stores. It is also known for its holdings in the