Just to add to that, see Mooseman's post above.
I have generally not worried too much about the oil itself and have for years just used what synthetic is on sale for my conventional engines. But now we're starting to get into these small turbocharged engines, the recent changes in oil additives (reductions), and the issue of LSPI (low speed pre-ignition). Over the summer we bought a 2016 Buick Encore that my wife mostly drives. It has a 1.4 l turbo charged 153hp engine. It requires synthetic. Given the issue of LSPI I'm going to be sticking with Dexos approved oil once we get the free dealer oil changes behind us.