I agree. Kept the quart bottles from last 2 oil changes, 8 from pickup and 4 from wife’s car. Sat the box on my work bench and transferred to the quart bottles. Interesting. I marked the original full levels on the bottles with a Sharpie prior to the 2 oil changes. When I had filled the 12 bottles to the mark, I had almost 1/2 quart left in the bag. Will work good in the future since the Focus and EcoSport take 4 1/2 quarts. They both require 5w20, but I have always used whatever I have left over from previous changes for the half quart, so next time it will be 5w30.
Also used one of the dealer free oil changes last week on the Explorer.
Hoarded a little more this week with an online WM purchase of two 5 gallon jugs of PP 5w20 for $21 each with the $25 gift card Pennzoil rebate.