Ok, maybe we were wrong about needing that fence along the border.

Now that a gallon of regular unleaded in Southern California averages a mind-boggling $4.61 cents a gallon, the San Diego Union Tribune says Gringos are crossing the border in droves, filling up in Tijuana, where  gas is about $2.54.

Mexican gasoline is so cheap because it comes from Pemex, the national gas company, which is heavily subsidized by the government. There is now discussion in Mexico about changing that unsustainable business model, but so far, it's only talk. Fill 'er up!