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I have a 04 Ex, 6.0 PSD, 134K miles. I am starting to see ECT and EOT splits with about 14-16 under normal conditions and 16-21 with pushing Beast over 75mph (over 2100 RPM). I would like to replace the engine oil cooler with an external oil cooler but haven’t been able to find a good thread which discusses this topic. Can anybody point me in the right direction?