" I would have worded the poll questions differently and/or included other options."
Well, I've owned 2 turbo vehicles, and neither one required premium, but IIRC, my Volvo recc premium for max performance, but regular was fine (I think many cars self-adjust the timing to compensate).
So I chose the closest:
The owner's manual is silent as to the grade of gasoline or says to use regular (min 87 octane)
But since I owned 2 of them, I should have been able to vote twice. And the two might have been different (they weren't though), so multiple choices should be allowed as well.
FYI, one was a 2000, the other 2017 - model year might make a difference as well.
-ERD50