It's acceptable to use 0W-20 engine oil in place of 5W-20 or even 10W-20, since the number preceding the W refers to its ...
Q: I have a 2016 Toyota Camry that takes 0W-20 engine oil. I need to add about half a quart, and I have some unused leftover 0W–20 oil in the garage. However, it is about 2½ years old.