Abstract: A heat exchanger tube for an automobile cooling system comprising a first end, a second end and a wall formed from a unitary sheet of formable material. The wall has an outer surface and an inner surface and includes a first side and a second side spaced apart and parallel to one another extending longitudinally between the first end and the second end, a first distal end, a second distal end, a first edge, a second edge, a first partition, a second partition and a compound partition extending between the first and second sides longitudinally between the first and second ends and defining four fluid channels extending longitudinally between the first and second ends.