Changed oil and lub'd it every 5000 miles, for 214,000 before trading my GMC 2500 in on a 2015 2500 - never needed oil between changes...
No regrets, would have kept it longer, but small things began to wear, and we were heading out on a five-month cross-country. Wife felt uncomfortable with that many miles. Love the 2015 too, and the upgrade to six-speed and 4:10. Changed brakes ONCE in all that time, but they were coming due again. That's a lot of comfortable miles. Changed tires about four times in that many miles and a couple batteries.
Take care of your vehicle, it will take care of your travels :):)