Just one catch- it’s in Mexico
Why is gasoline so much cheaper across the Rio Grande? Two main reasons. First of all, Petroleos Mexicanos, the state-owned oil company, controls prices with the assistance of the Mexican government, which is not keen to see the price of gasoline go up too high for fear of public unrest. Also, Mexican environmental laws are not as strict as laws in the U.S., and gasoline sold in Mexico is not required to have many of the special blends designed to hold down air pollution, which jack up U.S. prices.