YES. Indeed the exact cocktail I been using in the wife's car. Part 0w20 + part 0w30. That is until I empty my reserves.
I think once I am ready to restock I will swap over to 5w30 going forward.
I am not in the least bit concerned about MAYBE losing 1-2 mpg by going with something other than CAFE's 0w20 they have pushed on everyone the last several years. Really.... What is next? They gonna try to force us all into using some "baby oil?"