2011 Isuzu NLR Engine Losing Oil Despite Repairs

I own a 2011 Isuzu NLR, and despite having the engine reconditioned, the vehicle continues to lose oil. I’ve contacted the service multiple times, but they keep saying this is a known issue with Isuzu models. On top of that, the check engine light is on, and the truck lacks power, yet they can’t seem to identify the problem. This ongoing issue is beyond frustrating, and I feel like I’m not getting the support I need from the service center. I expect Isuzu to take this problem seriously, find the root cause, and fix it immediately. A reconditioned engine should not have these kinds of problems.