The Oakville Refinery (also known as Petro Canada Oakville Refinery) was a refinery located on the border of Oakville and Burlington in Ontario, Canada. The refinery was commissioned in 1958 by Cities Service Company. It had an initial capacity 25,000 barrels per day (4,000 m3/d). In 1963, the refinery was acquired by BP. Later it was acquired by Petro-Canada and supplied fuel in Ontario. It closed in 2005, with Petro-Canada (now Suncor Energy) getting supplies for the Ontario market from its Montreal Refinery.