Stuck piston rings? - 1.9DCi, overnight soak / flush?

Hi Guys, I think I've narrowed my problem down to the piston rings (or bore) being stuck or worn.



I've read that some people have had success with the flushing fluid, which you leave overnight? Can anyone categorically state that they have used this stuff and it has worked? If so - what was the gear and the procedure please?



Thanks



Paul