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A “broke in” engine will be more efficient than a “New” engine. As the tolerances in the bearings wear there is less friction on the moving parts allowing it spin more freely.
New to this forum, member on the Dodge forum. I signed up here hoping it sees more action than the Dodge forum. Bought a 2022 2500 6.4 4x4 after my 05 2500 5.7 rotted out (northern truck.) It had the NV4500 in it. Since nobody offers a straight drive 3/4 or 1 ton anymore in here to find out if...