Under its American ownership, Canadian Oil Companies used the same product names and advertising schemes that National used in the United States.

From the early 1910s Canadian sold White Rose Gasoline, En-Ar-Co Motor Oil, and Black Beauty Axle Grease.

In 1937 Canadian held a competition to design a new White Rose logo, and the winner was Bill Templeton.

For many years Canadian Oil Companies had its head offices in the Terminal Building on the Toronto waterfront.

Concurrent with the closure of the Petrolia facilities, Canadian Oil built a new refinery at Corunna, Ontario, just south of Sarnia.

On 25 September 1952, Liberal Member of Parliament C. D. Howe opened the new $23 million Sarnia facility.

[6] In 1955, Canadian acquired the Anglo-Canadian Oil Company, Limited, headquartered in Calgary.

Shell sold her in 1991 after which time she carried the names Le Crede, Colon Trader, and Cypress Point.

Shell's acquisition included Canadian's refineries in Sarnia and Bowden, two tanker ships, 150 storage tanks, and 3,000 White Rose gas stations.

[10] The takeover of Canadian by Shell followed several other American acquisitions of major domestic oil companies.

New Democratic member H. W. Herridge suggested a delay in the acquisition and asked if Prime Minister John Diefenbaker would urge the directors of Canadian to "put Canada first".

"[11] Before the sale was finalised, the Calgary Herald opined that "another part of Canada seems about to slip through Canadian fingers.

[...] As regrettable as the situation may be in terms of our nationhood, it seems scarcely reasonable to expect that the shareholders will reject the offer.

The Bowden oil refinery closed in 2001, although the gas processing plant continued to run.

[13] On his 1995 album Drive-In Movie, Fred Eaglesmith recorded the song "White Rose".

The lyrics include the line "I guess the White Rose filling station is just a memory now".