I don't know about the rislone, but last week infact I had the jeep tick quite bad, it used to only be at higher rpms but now it was even at idle. I changed my oil to some mobil 1 high mileage and put in half a bottle of marvel and 2 oz in the gas tank.
started her up and haven't heard the tick since, it idles smoother, less vibration and there is no exhaust popping either. I highly recommend it considering its a 10 dollars and 5min job
1992 Black YJ and couldn't be more happy.