Originally Posted by JTK
Originally Posted by Cujet
The differences are so minor, even mild temperature changes affect viscosity more than the difference in specs.
That would be my take as well.
These engines wouldn't feel the difference between a 0w16 and a 5w30, aside from an extreme cold start.
I think they do. Reason being is I notice how much more sluggish it's running with 5w30 and how quieter the engine is.