Just drive across the border.
It’s what a growing number of Arizona drivers are doing, according to a March 20 article over at myfoxphoenix.com (see here).
Gas prices are so much lower in Mexico for a number of reasons, including government price controls – but the point to be taken is that physical scarcity is not an issue south of the border. There is an ample supply of oil. If there weren’t, the prices would be going up everywhere, not just here.