this~ I remember years ago when I had started using Havoline in pretty much everything (Pre-depositshield) and then started putting it in my parents vehicles. My dad's f150 with the 4.6 started to use oil for a bit after switching it from whatever was used in it previously but after a couple intervals it stopped using.
Originally Posted by PimTac
It's been debated here but I've seen engines that ran on one particular oil for a long time and after a switch of oil brands this kind of thing happens. Watch it and see if solves itself after a couple more oil changes.