CALGARY, June 10 (Reuters) - The U.S. is still reliant

on Canadian oil imports, despite claims made by U.S. President

Donald Trump, Cenovus Energy's ( CVE ) CEO said on Tuesday at a

conference in Calgary, Alberta.

Trump has threatened on-again, off-again tariffs on Canada's

oil, of which nearly 4 million barrels per day are exported to

the United States.

Canada also remains dependent on U.S. energy systems,

Cenovus CEO Jon McKenzie said, adding the country must diversify

its customer base.