Keep in mind that the US is the worlds largest oil producer right now, and exports ~30% of production. North America as whole has a serious oil output that mass

Keep in mind that the US is the worlds largest oil producer right now, and exports ~30% of production. North America as whole has a serious oil output that massively over-serves what is needed by the continent. Canada, arguably the closest US ally, is number 4 for oil output, and Mexico is 11th. Keeping the reserves full doesn't really serve a purpose when you are capable of producing far more than you need.