Californians Head to Mexico for Gas

California "It's just over $2-dollars a gallon for diesel down there so it's a significant savings. This will pay for itself after four or five trips," said customer John Watanabe.

Gas prices in Tijuana are about one-third cheaper than in southern California because the Mexican government subsidizes fuel costs.

Some truck owners are even investing in high-capacity diesel-fuel tanks, so they can hold even more fuel after a trip to a Mexican gas station.

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