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Message: [QUOTE="Mdub707, post: 755503, member: 107"] Not so much EOT. I guess I should have been more clear. When I'm coasting down a hill or let off of the throttle, ECT seems to peel off very quickly. It might throw cause for concern for some folks as the ECT drops and EOT is still 10* higher... I think it's just the coolant system is way more efficient with all of the new parts than it was before... that and I have that huge 51 gallon tank of a heat sink in the bed. Before ECT and EOT would stay closer together, and they still do when cruising or towing, but when I let off ECT just drops very quickly.... more just notes and observations than anything. Switching from 15w-40 rotella to 5w-40 rotella and archoil 9100 dropped my average EOT 2-3* under all conditions. [/QUOTE]

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