If I'm reading that right, there is a similar thing fitted to aircraft. Fuel Cooled Oil Coolers (FCOC) or Air Cooled Oil Coolers (ACOC). The ACOC work just like a radiator: oil flows through the cooler with cold outside air passes through taking the heat with it. The FCOC works similar, but is sealed inside a fuel tank/cell and as the fuel is pumped through the tank/cell it passes around the cooler taking the heat from the oil which in turn heats up the fuel ready for combustion: also helping with that process.