I have friction modifier in mine. I did not try honey without the friction modifier because it seemed to be the preferred way when I installed the honey. I did drive a 2000 SVT that came with honey. I don't know if it had friction modifier in the stuff that was drained or not. The refill did include friction modifier with honey and it did shift better than before the change.
The last thing on this topic I heard from Terry Haines was that the friction modifier should be used on an "as needed" basis.
