[Transport3r]

Originally Posted by Dzmitry

Just to add to this, to be more clear, 0w-30 and 0w-20 do not have the same cold start protection. 0w-30 may have a higher viscosity index (but not always, you can search up various oils and their viscosity indexes to get an idea), but it will still have a higher viscosity at most of the temperatures we witness.

EDIT: quick example - see link below on last page. Notice that even a 5w-20 still has better cold start protection than a 0w-30. The number on the right tends to hold fairly true for how oil behaves at hot temperatures, but the number on the left is more of a general guide for what the oil is trying to shoot for so to speak. Further apart, such as 0w-40, means the oil will typically have a better index, which is a good thing.
https://amsoilcontent.com/ams/lit/da...tins/g2880.pdf

Fair enough, thanks for that. Still, better cold start protection than a comparable 5w30.