Bad oil scraper ring fix?

My 912is has been burning a small amount of oil from the #1 cylinder for a few flights now. It's not enough to show any decrease in oil quantity after a less than one hour flight but it is enough that it is expelling some burnt oil from the exhaust fitting on the cylinder. A differential pressure test today showed no leakage however a horoscope through the upper spark plug hole showed enough oil in the cylinder to give me another reason to think I have a bad oil scraper ring.

Wondering if anyone has ever tried the AUTOMOTIVE technique of letting some B-12 Chemtool sit in the cylinder to attempt to remove a carbon deposit that COULD be causing the burnt oil. IF, IF, I do this I would change the oil right after allowing the engine to idle (as Berryman recommends) but I am still hesitant to try this procedure.