1880 - 16 oil refineries pool their resources and form Imperial Oil Company, London, Ontario
1883 - Moves operations to Petrolia, Ontario after lightning strikes refinery
1896 - In need of expansion capital, sell majority interest to Standard Oil, USA
1899 - Takes over Canada's Standard assets and moves to London, Ontario
1907 - Open Canada's first gasoline station in Vancouver
1920 - Discover oil just south of the Arctic Circle at Norman Wells, Canada's first self-serve gas station was opened.
1936 - Hockey Night in Canada comes to radio with Imperial as its first sponsor. Games three stars introduced to promote its 3-Star brand of gasoline.
1947 - Make major oil discovery at Leduc, Alberta
1959 - Corporate name becomes Imperial Oil Ltd.
1964 - At Cold Lake Alberta, begin an experimental program to extract bitumen from oil sands.
1970 - Discover Canada's first Arctic oil, Atkinson Point in Beaufor Sea
1978 - Esso Resources Canada Ltd. formed to manage natual resources activities
1981 - Esso Petroleum Canada is formed to manage petroleum-product operations
1985 - Production of bitumen begins at Cold Lake
1989 - Imperial purchased Texaco Canada
1990 - Introduce new environmentally friendly products