I would look for some serious knowledge from folks who can point to the science behind their claims, which pretty much means trying to forget most of what is posted on this thread, LOL. Spend some time on the "bob's your oil guy" and Blackstone sites. get a sample kit from Blackstone, send them a sample from your next change, and take it from there.
If you want another opinion added to this mess, well, here goes. IMHO, 3K is far too often, and for the insignificant cost difference between dino and synth. there is no way I will ever run dino oil in my vehicles. Good luck.