You’d get more wear protection with a 30-grade.You raise valid points. My reservation in running 20 weight is the fact many of these guys who have worked on these for years in a dealer are saying 0w-16 is the only option long term. Again I’ve built engines, never messed with ultra low viscosity hybrid engines, so sticking with what the manufacturer recommends seemed like a solid plan. Really doubt anything could be gained wear wise with a 20 weight anyhow, so prob doesn’t matter in the end. I’ll use the 0w-16 I have on hand.