Nice report. I also have a 2019 CX 5 with the turbo engine. I am running Castrol Edge 5W-30 but do not intend upon going more than 5000 miles between changes. Partly because I make a lot of short trips so probably qualify under the severe service category and partly because I like to err on the side of caution with regards to possible fuel dilution. I will run a Blackstone report at the 10,000 mile point once the engine is well broken in and see how my plan is working.