I see VW now calls for 0/20 oil for my 2018 Tiguan. I assume this is to improve mileage numbers. I would prefer to continue with 0/30 or 5/30. Without doing a deep dive into oil science, does anyone see a problem with 0 or 5/30? After owning gas powered VW's for over thirty years and doing all the oil changes, I'm new to the zero weight oils. It's always been 5/30 or 5/40.
Thanks in advance.