My 2012 did the same thing, and it was a 3/4 ton without the MDS. I would run 5W20 and 5W30 Mobil1, Pennzoil, Quaker State, house brands it didn't matter. Did it from 45K to the time I traded it with 93K with 5K oil changes. I did have the exhaust manifold studs replaced under warranty after it snapped 3/4 of them, but the tick was still there afterwards and was definitely lifters. I got rid of the truck because it couldn't stay out of the shop longer than two months without needing something fixed, and the noisy lifters were always shrugged off as "it's normal".
Run it 'til she blows, at the mileage you're at now I'd be worried about dropping a valve seat and grenading the engine that way. Either that or dump it for whatever you ran in it previously (if it was different), see if that makes it happy.