That is true and remains true to some extent. However, in the case of a signifcant emergency - oil drawn from the reserves would be prioritized to the military and related industries and infrastructure.
Indeed it would. Military needs would also be met easily by rationing civilian use since the USA produces eight million barrels a day on its own. Barring Democrat resistance in Congress to restricting civilian use of petroleum products in time of war (yes, they would try that.)