According to industry experts, the oil cooler on a 6.0L lasts about 50,000 miles before failure rapidly approaches. We know: that’s not a very long time—especially for trucks that are used every day for work. One of the most affordable ways to make your factory oil cooler last is to install a coolant filtration system such as this one from Sinister Diesel (PN SD-COOLFIL-6.0-W). A bypass-style system, its coolant filtration kit filters a small portion of engine coolant at a time, and all suspended solids or chunks of debris are trapped in the filter. By eliminating the possibility of debris from lodging in the oil cooler’s coolant passageways (and changing the filter at the proper interval), the oil cooler could potentially last the life of the vehicle.