Did my first oil change at 1300 miles. I never noticed any usage, but the dipstick was reading high from the extra quart added at the factory. We now have 3.8K on the clock and just got back from a 2K mile road trip to Southern California.
Picture shows where I’m at now. I will note I pushed it HARD when we were going through the passes near Ashland and Mt. Shasta. I expect this bit of oil consumption to be normal at this stage of the engine life. GM expects it to burn some early on given the extra quart they add.