Mishimoto 1994.5-03 Ford 7.3L Diesel Stock Replacement Oil CoolerOil is the lifeblood of an engine, and in a hardworking diesel engine like the 7. 3L Powerstroke, keeping that oil cool is essential to the engine's health. The stock 1994 2003 7. 3L Powerstroke liquid to liquid oil cooler transfers heat out of the oil and into engine coolant to properly regulate fluid temperatures. Its a stout design that typically performs well. With some of these 7. 3L trucks nearing 30 years of age, it's common to find debris