I'm not a fan of boycotts, so what follows is just a bit of trivia that might interest people who were insulted by Hugo Chavez's recent lunacy: CITGO is owned by the Venezuelan government.
The company is owned by PDV America, Inc., an indirect, wholly owned subsidiary of PetrĂ³leos de Venezuela, S.A., the national oil company of the Bolivarian Republic of Venezuela.
That means that if you buy gas from a CITGO station, you're directly supporting the Chavez government.
(HT: DeoDuce and reagan80.)