A liquid fuel cooling system includes an intake line, a heat exchanger, an exhaust fine, a fuel pump, and an amount of frozen carbon dioxide. The intake line connects the heat exchanger to a fuel source, and the exhaust line connects the heat exchanger to a fuel destination. The fuel pump moves fuel from the fuel source, through the intake line, through the heat exchanger, through the exhaust line, and to the fuel destination. The frozen carbon dioxide is disposed against at least a portion of the heat exchanger to draw heat away from the fuel. Optionally, a system can include dual heat exchanger connected via a bridge line, with the frozen carbon dioxide being disposed there between.