So- ive been seeing posts on forums- where folks say that running Conventional oil in newer engines can lead to sludge buildup. Example the DI 3.6 since thats what I have. They say these engines run hotter and Conventional will not hold up like a Synthetic will. I have a 2010 3.6 DI in my Traverse. Ive always used Valvoline Conventional 5W-30 at 5,000 mile intervals. My UOA have been very nice. (as posted on BITOG) Im now at 82,000. So im just curious about what you folks have to say about this and potential sludge buildup in my engine. What if I did a couple of 2500 to 3000 mile Oil change intervals using VWB to clean out any potential sludge?