There's something else going on here. With a 3k mile interval, the recommended oil should not show wear that high. Oil brand will have no effect, and viscosity might help a little. My guess? The current driving regimen is severely hampering the oil's effectiveness.
"Will Your Car Survive an EMP?"
Only if running ESP 5W-30
But in all honesty, that's the least of my worries where this scenario is concerned. It truly is a horrifying thought.