I did this a couple years ago to the same engine I believe (1.4)..
https://bobistheoilguy.com/forums/threads/cruze-1-4-underneath-valve-cover.347467/#post-5927039
2013 111k mi
Using a variety of synthetics edge, magnatec, pp, rgt, m1 afe. At around 3500 oci max ever 5k. I was hoping for it to be a little cleaner but it's not terrible. Opinions?
I'm inclined to think this as well, it's just I had some edge 0w40 left over from an old vehicle that got traded. One note however this is the older gen cruze without di.