The San Antonio refiner Andeavor is planning to build a $100 million fuels terminal in the Mexican city of Rosarito, about 20 miles from the U.S. border, as American energy companies continue their push into one of the world's biggest fuel markets.

Andeavor and other companies have expanded into Mexico since the country reformed its energy markets four years ago, and ended the nearly 80 year monopoly of the state-owned oil company Petroleos Mexicanos, or Pemex. U.S. gasoline exports to Mexico have more than doubled since 2014, climbing to about 154 million barrels in 2017, according to the U.S. Energy Department.

Andeavor said the planned terminal would reduce the cost of transporting fuel into Baja California, a state in northwest Mexico. The city of Rosarito is located on the Pacific Coast of Baja California.

"This logistics project will further strengthen Andeavor's ability to cost effectively deliver gasoline and diesel to our customers directly from our refineries on the West Coast," said Andeavor CEO Greg Goff.