I went to a GM class last week on their new diesels, and the guy had no info on this new engine, other than they were "forbidden" from going into an area of the plant where they were being assembled.
Of course, the guy was a complete moron. Acted like a variable displacement oil pump was some sort of cutting edge voodoo magic
And kept referring to the 1.6L as "a little bitty engine that don't make a lot of power", to which I called up my 4th grade math and schooled him that it makes more power per liter than the mighty V8, of which he seemed to adore. It may have been he assumed the room was fool of mouth breathing knuckle draggers (of which there were plenty in attendance).
Oh, I did finally get one tidbit out of him: the fuel filter interval is set into the flexible service system. So it isn't necessarily a fixed thing, but to the best of my knowledge maxes out at 30k miles. They also moved the fuel filter on the big trucks, and the 1.6L requires a half inch extension wedged against the filter housing and the body to prevent it from cracking during removal. Seriously. There are even pictures in the official GM service lit clearing showing an extension and where to place it. LMAO...