I'm doing an oil change on my gf's parents new '19 Atlas. There seems the be a wide variety between the recommended oil viscosities. I've ordered 0w40 for this oil change, but I'm wondering what would be the best option for next time. I saw a similar post on here but I didn't want to restart it. They go a good distance between oil changes, the next one will probably be in winter here in Missouri, maybe later. So what would provide the best protection for winter and summer driving? Thanks in advance.