Since the Q7 calls for the Euro 5w-40, I was thinking to that an occasional bottle between oil changes would not damage it as I am not running a full seven quarts of R&P. Y'all have used some letter and numbers that I am not totally familiar with, so I will study that before doing anything.
It seems to be back on using a quart every 1000+ miles or so. Much better than it was before the OPR repair. So, I thought using a quart of the R&P as one or two of the top-up quarts between oil changes (alternating between the R&P and the 5w-40)might offer a little cleaning while not affecting the viscosity too much. Hell, by the time the OCI comes around (if I were to follow Audi's scheduling), I have probably done an oil change. I am not going to wait that long from now on. I think that their OCI recommendation is too long for my liking.
I thank you both for your opinions and welcome more.