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I change mine once a year or 10k whichever comes first.
I have been using Royal Purple full synthetic 15W40 in mine since new but have been considering trying out the Hot Shots diamond brand oil.
2016 Ram Laramie 3500 (DRD), G56, 6.7, Rough Country Leveling, HID headlights, Morimoto LED fogs plus a whole lot more!
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