I tried Castrol in my truck a few yrs back and, it used a quart between oil changes. I then went to
Valvoline and the oil consumption stopped. Don't have any clue why but, it did.
However, back in the 1970s when I got my first vehicle, and the next few vehicles afterward, I used
Castrol with no problems whatsoever. I'm not sure why it didn't work well in my newest truck and
Valvoline did. Back then though, all I was using was conventional oil, (Havoline), and both were synthetic
when I tried them in my newer truck.
I do now use the Havoline, again, in my truck. The Pro DS 5W20 and the truck doesn't use any between oil changes.
It stumps me although, I am by no means an oil expert.