Premium? I never thought that any output motor today would run on anything but mid grade on emergency, but premium required, this cubic inch motor and horse power should run its best on Ethel and best mileage, my 6.4 is premium, why would Foed not be, sounds to me like yall don’t want to spend the money. I’m going to Ford site and find out what factory says, not trying to be smart ass, just doesn’t sound right for any high output motor.
