I have heard of trans fluid for flushing, I am one of those " old timers." I agree with fordem too, it is OIL so it has lubricant properties. We even used to use it for fork oil in our older bikes. But back to the stuck ring question. There are specific products just for this situation, designed to free up stuck parts. You could pull all the plugs and fill the cylinders with an oil based penetrant and let it sit for a couple days then turn it over with the plugs out to blow all the crap out.
The problem with " breaking down deposits " is how do you get them out of the engines oil passages once their loose? If it's just liquid it can be flushed out, but you'll always have some left in there.
If the cylinders were left dry for a long period ( years ) there's also the possibility of rust on the walls, rust on the valves, and pretty much any part that oil drained away from over time. Moisture in the air can get into the engine through the air intake or breathers or carb and settle, eventually rusting parts, especially if the said engine was not properly set up for long term storage. The only way to know for sure is to have a look at the inside, either with a scope or by removing the head and or the oil pan and LOOKING at the parts.
I just finished rebuilding a block that had been left outside for LESS than a year, with the head and intake system on. Piston rings were rusted solid to the walls, and once the pistons were finally removed I found the rings were seized solidly in the ring lands. If your Sammy is in decent shape and you plan on driving it for some time to come, do it right, have a look inside and give yourself some peace of mind as well. Better to fix it right now, then go for a TOTAL rebuild later. There are no quick, miracle fixes that you can just pour into an engine, although there are many products that will lead you to believe they can fix anything from worn out rings and cylinder walls to bad valves and " smoking." At best they are a temporary band aid and only succeed in draining your wallet. If your goal is a short term masking of the problem, then by all means try every product available until you achieve the desired results.
We're only trying to help here and it may sound like criticism, but some of us " old timers " have tried everything your doing when we were in the same boat. How do you think we learned?