Many U.S. oil refiners rely heavily on imported crude because their facilities are configured to run heavier grades, such as those coming in from Mexico and Canada.

Tariffs on oil imports mean higher costs for making finished fuels like gasoline, much of which is likely to be passed along to U.S. consumers.

The U.S. has become reliant on their crude, and Canada has ways to limit any financial hit.

Crude oil futures moved higher in after-hours trading Friday as President Trump said U.S. tariffs would apply to crude, although he may reduce levies on Canadian oil from 25% to 10% beginning around February 18.

President Donald Trump announced tariffs on imports from Canada, Mexico, and China starting this Tuesday. The tariffs include 10% on energy imports from Canada and 25% on other goods, potentially raising prices on cars,