2006 and 2007 F-Series
Commentary: There is little doubt that having more coolant levels will extend the length of time required to plug the coolant pathways. However, the real question still remains "How much longer?" If, for example, the average oil cooler goes 50,000 miles before failing, will the new design last 10% longer - say, 55,000 miles?
Conclusion: After adding one additional coolant level, the critical issues with the OEM oil cooler still exist: the plugging of the coolant paths and the internal rupturing of the plates, allowing oil to fill the engine's cooling system.