Building on this response, as it pertains to the preferred surface on the 916, it will all depend on how you want to play the lanes. In reality if you play the lanes correctly and start playing the fresh fairly straight on heavier oil you can stay with the ball longer at its box finish. I would just make sure that before bowling on the heavy do a quick refresher job with a 2000 pad, and then just enjoy your night of bowling.
However, as a preface to this comments, I have no idea of your game in terms of stats so your particular game might require you to change the surface to get the same reaction out the ball as I do at box 2000.