That's reassuring to hear, I really like DI and the 5.3 itself. AFM and the odd 6l80e shifting strategy are the only things that bother me. Being that I am a tinkerer and fix all my own stuff, as well as tune it, it sounds like it will never be a problem. At least not one that I lack the capability to prevent. Once the engine is broke in on mine I plan to start running Archoil because I love how clean it keeps my engines, and have good experience with it fixing stiction and stuck rings. I also only use top tier filters and oil, which get changed around 6-8k miles or so, which is generally around once a year. We have lots of cars and split mileage between them all, but still change oil once a year even if I don't hit the mileage or wear it out.