I know a number of people that have had good luck using Auto-RX to free up sticky rings. This wasn't on an IDI, but it might be worth a shot. The only issue I see is that Auto-RX works slowly over time and with the rate that yours is burning oil the Auto-RX may not be in there long enough to do it's thing.
Maybe others will chime in with other oil additive options. I know I have heard of some people mixing more aggressive cleaners in the oil, letting it idle for a brief period of time and then changing the oil again.
Maybe others will chime in with other oil additive options. I know I have heard of some people mixing more aggressive cleaners in the oil, letting it idle for a brief period of time and then changing the oil again.