continued But according to Cesar Mayoral, a Tijuanense who filled his gas tank in San Ysidro on a recent Wednesday, people are bringing American gasoline into Tijuana for sale on the black market. "I know of two or three places out in the colonias where you can buy American gas. They don't use cans to bring it down there. They fill up the tanks of their cars and then use hoses to siphon the gas into cans when they get home. To tell you the truth, I've seen them filling up here in San Ysidro. They've even asked me to take gasoline down there for them, but I said 'No.' "